{
  "alt": "Line chart of the share of votes cast in counties within {fact:band} points of the national swing, for {fact:n_pairs} pairs of elections. The share is {fact:votes_within_1976} in 1972 to 1976, reaches {fact:votes_within_2012} in 2008 to 2012, falls to {fact:votes_within_2016} in 2012 to 2016 and returns to {fact:votes_within_latest} in 2020 to 2024. Measured against the mean county swing instead, the last value is {fact:votes_within_mean_latest}.",
  "caption": "The line reaches its highest values in 2008 to 2012 and 2020 to 2024, and no pair through 1980 to 1984 exceeds {fact:votes_within_early_max}. Each county's swing is measured against the national swing, the change in the summed margin; the text compares that reference with the vote-weighted mean of county swings. Switch views to count counties instead of votes.",
  "data": [
    {
      "basis": "Votes",
      "n": 1687,
      "pair": "1868–72",
      "reference": "National swing",
      "share": 22.4606,
      "year": 1872
    },
    {
      "basis": "Votes",
      "n": 1687,
      "pair": "1868–72",
      "reference": "Mean county swing",
      "share": 22.6911,
      "year": 1872
    },
    {
      "basis": "Counties",
      "n": 1687,
      "pair": "1868–72",
      "reference": "National swing",
      "share": 16.5382,
      "year": 1872
    },
    {
      "basis": "Counties",
      "n": 1687,
      "pair": "1868–72",
      "reference": "Mean county swing",
      "share": 16.6568,
      "year": 1872
    },
    {
      "basis": "Votes",
      "n": 2151,
      "pair": "1872–76",
      "reference": "National swing",
      "share": 26.1449,
      "year": 1876
    },
    {
      "basis": "Votes",
      "n": 2151,
      "pair": "1872–76",
      "reference": "Mean county swing",
      "share": 16.8215,
      "year": 1876
    },
    {
      "basis": "Counties",
      "n": 2151,
      "pair": "1872–76",
      "reference": "National swing",
      "share": 22.9196,
      "year": 1876
    },
    {
      "basis": "Counties",
      "n": 2151,
      "pair": "1872–76",
      "reference": "Mean county swing",
      "share": 17.3873,
      "year": 1876
    },
    {
      "basis": "Votes",
      "n": 2216,
      "pair": "1876–80",
      "reference": "National swing",
      "share": 61.1136,
      "year": 1880
    },
    {
      "basis": "Votes",
      "n": 2216,
      "pair": "1876–80",
      "reference": "Mean county swing",
      "share": 60.3605,
      "year": 1880
    },
    {
      "basis": "Counties",
      "n": 2216,
      "pair": "1876–80",
      "reference": "National swing",
      "share": 47.9242,
      "year": 1880
    },
    {
      "basis": "Counties",
      "n": 2216,
      "pair": "1876–80",
      "reference": "Mean county swing",
      "share": 47.6986,
      "year": 1880
    },
    {
      "basis": "Votes",
      "n": 2283,
      "pair": "1880–84",
      "reference": "National swing",
      "share": 51.5388,
      "year": 1884
    },
    {
      "basis": "Votes",
      "n": 2283,
      "pair": "1880–84",
      "reference": "Mean county swing",
      "share": 51.5375,
      "year": 1884
    },
    {
      "basis": "Counties",
      "n": 2283,
      "pair": "1880–84",
      "reference": "National swing",
      "share": 39.4656,
      "year": 1884
    },
    {
      "basis": "Counties",
      "n": 2283,
      "pair": "1880–84",
      "reference": "Mean county swing",
      "share": 39.4656,
      "year": 1884
    },
    {
      "basis": "Votes",
      "n": 2345,
      "pair": "1884–88",
      "reference": "National swing",
      "share": 60.8385,
      "year": 1888
    },
    {
      "basis": "Votes",
      "n": 2345,
      "pair": "1884–88",
      "reference": "Mean county swing",
      "share": 58.7269,
      "year": 1888
    },
    {
      "basis": "Counties",
      "n": 2345,
      "pair": "1884–88",
      "reference": "National swing",
      "share": 50.1066,
      "year": 1888
    },
    {
      "basis": "Counties",
      "n": 2345,
      "pair": "1884–88",
      "reference": "Mean county swing",
      "share": 48.2729,
      "year": 1888
    },
    {
      "basis": "Votes",
      "n": 2424,
      "pair": "1888–92",
      "reference": "National swing",
      "share": 60.6496,
      "year": 1892
    },
    {
      "basis": "Votes",
      "n": 2424,
      "pair": "1888–92",
      "reference": "Mean county swing",
      "share": 61.5948,
      "year": 1892
    },
    {
      "basis": "Counties",
      "n": 2424,
      "pair": "1888–92",
      "reference": "National swing",
      "share": 43.5231,
      "year": 1892
    },
    {
      "basis": "Counties",
      "n": 2424,
      "pair": "1888–92",
      "reference": "Mean county swing",
      "share": 44.1007,
      "year": 1892
    },
    {
      "basis": "Votes",
      "n": 2654,
      "pair": "1892–96",
      "reference": "National swing",
      "share": 22.6821,
      "year": 1896
    },
    {
      "basis": "Votes",
      "n": 2654,
      "pair": "1892–96",
      "reference": "Mean county swing",
      "share": 23.585,
      "year": 1896
    },
    {
      "basis": "Counties",
      "n": 2654,
      "pair": "1892–96",
      "reference": "National swing",
      "share": 18.3873,
      "year": 1896
    },
    {
      "basis": "Counties",
      "n": 2654,
      "pair": "1892–96",
      "reference": "Mean county swing",
      "share": 21.2509,
      "year": 1896
    },
    {
      "basis": "Votes",
      "n": 2695,
      "pair": "1896–1900",
      "reference": "National swing",
      "share": 37.7539,
      "year": 1900
    },
    {
      "basis": "Votes",
      "n": 2695,
      "pair": "1896–1900",
      "reference": "Mean county swing",
      "share": 32.6199,
      "year": 1900
    },
    {
      "basis": "Counties",
      "n": 2695,
      "pair": "1896–1900",
      "reference": "National swing",
      "share": 30.0557,
      "year": 1900
    },
    {
      "basis": "Counties",
      "n": 2695,
      "pair": "1896–1900",
      "reference": "Mean county swing",
      "share": 25.269,
      "year": 1900
    },
    {
      "basis": "Votes",
      "n": 2680,
      "pair": "1900–04",
      "reference": "National swing",
      "share": 29.1017,
      "year": 1904
    },
    {
      "basis": "Votes",
      "n": 2680,
      "pair": "1900–04",
      "reference": "Mean county swing",
      "share": 28.3271,
      "year": 1904
    },
    {
      "basis": "Counties",
      "n": 2680,
      "pair": "1900–04",
      "reference": "National swing",
      "share": 21.2313,
      "year": 1904
    },
    {
      "basis": "Counties",
      "n": 2680,
      "pair": "1900–04",
      "reference": "Mean county swing",
      "share": 21.9776,
      "year": 1904
    },
    {
      "basis": "Votes",
      "n": 2707,
      "pair": "1904–08",
      "reference": "National swing",
      "share": 25.4442,
      "year": 1908
    },
    {
      "basis": "Votes",
      "n": 2707,
      "pair": "1904–08",
      "reference": "Mean county swing",
      "share": 25.1752,
      "year": 1908
    },
    {
      "basis": "Counties",
      "n": 2707,
      "pair": "1904–08",
      "reference": "National swing",
      "share": 23.1252,
      "year": 1908
    },
    {
      "basis": "Counties",
      "n": 2707,
      "pair": "1904–08",
      "reference": "Mean county swing",
      "share": 22.7558,
      "year": 1908
    },
    {
      "basis": "Votes",
      "n": 2832,
      "pair": "1908–12",
      "reference": "National swing",
      "share": 16.8038,
      "year": 1912
    },
    {
      "basis": "Votes",
      "n": 2832,
      "pair": "1908–12",
      "reference": "Mean county swing",
      "share": 17.7038,
      "year": 1912
    },
    {
      "basis": "Counties",
      "n": 2832,
      "pair": "1908–12",
      "reference": "National swing",
      "share": 14.8305,
      "year": 1912
    },
    {
      "basis": "Counties",
      "n": 2832,
      "pair": "1908–12",
      "reference": "Mean county swing",
      "share": 15.7839,
      "year": 1912
    },
    {
      "basis": "Votes",
      "n": 2942,
      "pair": "1912–16",
      "reference": "National swing",
      "share": 11.6688,
      "year": 1916
    },
    {
      "basis": "Votes",
      "n": 2942,
      "pair": "1912–16",
      "reference": "Mean county swing",
      "share": 11.4854,
      "year": 1916
    },
    {
      "basis": "Counties",
      "n": 2942,
      "pair": "1912–16",
      "reference": "National swing",
      "share": 12.7124,
      "year": 1916
    },
    {
      "basis": "Counties",
      "n": 2942,
      "pair": "1912–16",
      "reference": "Mean county swing",
      "share": 11.8967,
      "year": 1916
    },
    {
      "basis": "Votes",
      "n": 3018,
      "pair": "1916–20",
      "reference": "National swing",
      "share": 21.4234,
      "year": 1920
    },
    {
      "basis": "Votes",
      "n": 3018,
      "pair": "1916–20",
      "reference": "Mean county swing",
      "share": 23.0739,
      "year": 1920
    },
    {
      "basis": "Counties",
      "n": 3018,
      "pair": "1916–20",
      "reference": "National swing",
      "share": 15.8383,
      "year": 1920
    },
    {
      "basis": "Counties",
      "n": 3018,
      "pair": "1916–20",
      "reference": "Mean county swing",
      "share": 15.9377,
      "year": 1920
    },
    {
      "basis": "Votes",
      "n": 3048,
      "pair": "1920–24",
      "reference": "National swing",
      "share": 30.5611,
      "year": 1924
    },
    {
      "basis": "Votes",
      "n": 3048,
      "pair": "1920–24",
      "reference": "Mean county swing",
      "share": 30.7109,
      "year": 1924
    },
    {
      "basis": "Counties",
      "n": 3048,
      "pair": "1920–24",
      "reference": "National swing",
      "share": 24.836,
      "year": 1924
    },
    {
      "basis": "Counties",
      "n": 3048,
      "pair": "1920–24",
      "reference": "Mean county swing",
      "share": 25.1312,
      "year": 1924
    },
    {
      "basis": "Votes",
      "n": 3083,
      "pair": "1924–28",
      "reference": "National swing",
      "share": 10.6946,
      "year": 1928
    },
    {
      "basis": "Votes",
      "n": 3083,
      "pair": "1924–28",
      "reference": "Mean county swing",
      "share": 9.87588,
      "year": 1928
    },
    {
      "basis": "Counties",
      "n": 3083,
      "pair": "1924–28",
      "reference": "National swing",
      "share": 8.49822,
      "year": 1928
    },
    {
      "basis": "Counties",
      "n": 3083,
      "pair": "1924–28",
      "reference": "Mean county swing",
      "share": 7.91437,
      "year": 1928
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1928–32",
      "reference": "National swing",
      "share": 16.9258,
      "year": 1932
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1928–32",
      "reference": "Mean county swing",
      "share": 16.7098,
      "year": 1932
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1928–32",
      "reference": "National swing",
      "share": 16.9628,
      "year": 1932
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1928–32",
      "reference": "Mean county swing",
      "share": 16.5105,
      "year": 1932
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1932–36",
      "reference": "National swing",
      "share": 28.1459,
      "year": 1936
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1932–36",
      "reference": "Mean county swing",
      "share": 26.9785,
      "year": 1936
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1932–36",
      "reference": "National swing",
      "share": 22.6171,
      "year": 1936
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1932–36",
      "reference": "Mean county swing",
      "share": 20.7754,
      "year": 1936
    },
    {
      "basis": "Votes",
      "n": 3094,
      "pair": "1936–40",
      "reference": "National swing",
      "share": 40.9753,
      "year": 1940
    },
    {
      "basis": "Votes",
      "n": 3094,
      "pair": "1936–40",
      "reference": "Mean county swing",
      "share": 39.8768,
      "year": 1940
    },
    {
      "basis": "Counties",
      "n": 3094,
      "pair": "1936–40",
      "reference": "National swing",
      "share": 25.0162,
      "year": 1940
    },
    {
      "basis": "Counties",
      "n": 3094,
      "pair": "1936–40",
      "reference": "Mean county swing",
      "share": 24.4344,
      "year": 1940
    },
    {
      "basis": "Votes",
      "n": 3093,
      "pair": "1940–44",
      "reference": "National swing",
      "share": 62.0049,
      "year": 1944
    },
    {
      "basis": "Votes",
      "n": 3093,
      "pair": "1940–44",
      "reference": "Mean county swing",
      "share": 62.4197,
      "year": 1944
    },
    {
      "basis": "Counties",
      "n": 3093,
      "pair": "1940–44",
      "reference": "National swing",
      "share": 54.3162,
      "year": 1944
    },
    {
      "basis": "Counties",
      "n": 3093,
      "pair": "1940–44",
      "reference": "Mean county swing",
      "share": 54.8012,
      "year": 1944
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1944–48",
      "reference": "National swing",
      "share": 32.8882,
      "year": 1948
    },
    {
      "basis": "Votes",
      "n": 3095,
      "pair": "1944–48",
      "reference": "Mean county swing",
      "share": 32.0565,
      "year": 1948
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1944–48",
      "reference": "National swing",
      "share": 27.2698,
      "year": 1948
    },
    {
      "basis": "Counties",
      "n": 3095,
      "pair": "1944–48",
      "reference": "Mean county swing",
      "share": 27.496,
      "year": 1948
    },
    {
      "basis": "Votes",
      "n": 3094,
      "pair": "1948–52",
      "reference": "National swing",
      "share": 36.7043,
      "year": 1952
    },
    {
      "basis": "Votes",
      "n": 3094,
      "pair": "1948–52",
      "reference": "Mean county swing",
      "share": 35.3258,
      "year": 1952
    },
    {
      "basis": "Counties",
      "n": 3094,
      "pair": "1948–52",
      "reference": "National swing",
      "share": 24.2728,
      "year": 1952
    },
    {
      "basis": "Counties",
      "n": 3094,
      "pair": "1948–52",
      "reference": "Mean county swing",
      "share": 24.1758,
      "year": 1952
    },
    {
      "basis": "Votes",
      "n": 3097,
      "pair": "1952–56",
      "reference": "National swing",
      "share": 39.12,
      "year": 1956
    },
    {
      "basis": "Votes",
      "n": 3097,
      "pair": "1952–56",
      "reference": "Mean county swing",
      "share": 40.1457,
      "year": 1956
    },
    {
      "basis": "Counties",
      "n": 3097,
      "pair": "1952–56",
      "reference": "National swing",
      "share": 31.9018,
      "year": 1956
    },
    {
      "basis": "Counties",
      "n": 3097,
      "pair": "1952–56",
      "reference": "Mean county swing",
      "share": 32.3539,
      "year": 1956
    },
    {
      "basis": "Votes",
      "n": 3100,
      "pair": "1956–60",
      "reference": "National swing",
      "share": 27.0527,
      "year": 1960
    },
    {
      "basis": "Votes",
      "n": 3100,
      "pair": "1956–60",
      "reference": "Mean county swing",
      "share": 26.9433,
      "year": 1960
    },
    {
      "basis": "Counties",
      "n": 3100,
      "pair": "1956–60",
      "reference": "National swing",
      "share": 19.6774,
      "year": 1960
    },
    {
      "basis": "Counties",
      "n": 3100,
      "pair": "1956–60",
      "reference": "Mean county swing",
      "share": 19.2581,
      "year": 1960
    },
    {
      "basis": "Votes",
      "n": 3102,
      "pair": "1960–64",
      "reference": "National swing",
      "share": 29.3627,
      "year": 1964
    },
    {
      "basis": "Votes",
      "n": 3102,
      "pair": "1960–64",
      "reference": "Mean county swing",
      "share": 29.1942,
      "year": 1964
    },
    {
      "basis": "Counties",
      "n": 3102,
      "pair": "1960–64",
      "reference": "National swing",
      "share": 22.2115,
      "year": 1964
    },
    {
      "basis": "Counties",
      "n": 3102,
      "pair": "1960–64",
      "reference": "Mean county swing",
      "share": 21.9536,
      "year": 1964
    },
    {
      "basis": "Votes",
      "n": 3107,
      "pair": "1964–68",
      "reference": "National swing",
      "share": 37.1449,
      "year": 1968
    },
    {
      "basis": "Votes",
      "n": 3107,
      "pair": "1964–68",
      "reference": "Mean county swing",
      "share": 37.4615,
      "year": 1968
    },
    {
      "basis": "Counties",
      "n": 3107,
      "pair": "1964–68",
      "reference": "National swing",
      "share": 20.6308,
      "year": 1968
    },
    {
      "basis": "Counties",
      "n": 3107,
      "pair": "1964–68",
      "reference": "Mean county swing",
      "share": 20.8239,
      "year": 1968
    },
    {
      "basis": "Votes",
      "n": 3109,
      "pair": "1968–72",
      "reference": "National swing",
      "share": 28.9448,
      "year": 1972
    },
    {
      "basis": "Votes",
      "n": 3109,
      "pair": "1968–72",
      "reference": "Mean county swing",
      "share": 33.5866,
      "year": 1972
    },
    {
      "basis": "Counties",
      "n": 3109,
      "pair": "1968–72",
      "reference": "National swing",
      "share": 18.559,
      "year": 1972
    },
    {
      "basis": "Counties",
      "n": 3109,
      "pair": "1968–72",
      "reference": "Mean county swing",
      "share": 19.5883,
      "year": 1972
    },
    {
      "basis": "Votes",
      "n": 3110,
      "pair": "1972–76",
      "reference": "National swing",
      "share": 20.337,
      "year": 1976
    },
    {
      "basis": "Votes",
      "n": 3110,
      "pair": "1972–76",
      "reference": "Mean county swing",
      "share": 20.4234,
      "year": 1976
    },
    {
      "basis": "Counties",
      "n": 3110,
      "pair": "1972–76",
      "reference": "National swing",
      "share": 21.2219,
      "year": 1976
    },
    {
      "basis": "Counties",
      "n": 3110,
      "pair": "1972–76",
      "reference": "Mean county swing",
      "share": 20.418,
      "year": 1976
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "1976–80",
      "reference": "National swing",
      "share": 37.1152,
      "year": 1980
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "1976–80",
      "reference": "Mean county swing",
      "share": 37.7732,
      "year": 1980
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "1976–80",
      "reference": "National swing",
      "share": 29.6915,
      "year": 1980
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "1976–80",
      "reference": "Mean county swing",
      "share": 29.3059,
      "year": 1980
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "1980–84",
      "reference": "National swing",
      "share": 33.6979,
      "year": 1984
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "1980–84",
      "reference": "Mean county swing",
      "share": 33.6488,
      "year": 1984
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "1980–84",
      "reference": "National swing",
      "share": 27.7956,
      "year": 1984
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "1980–84",
      "reference": "Mean county swing",
      "share": 27.9242,
      "year": 1984
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1984–88",
      "reference": "National swing",
      "share": 61.7069,
      "year": 1988
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1984–88",
      "reference": "Mean county swing",
      "share": 62.3618,
      "year": 1988
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1984–88",
      "reference": "National swing",
      "share": 42.2286,
      "year": 1988
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1984–88",
      "reference": "Mean county swing",
      "share": 42.3571,
      "year": 1988
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1988–92",
      "reference": "National swing",
      "share": 48.6492,
      "year": 1992
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1988–92",
      "reference": "Mean county swing",
      "share": 49.5678,
      "year": 1992
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1988–92",
      "reference": "National swing",
      "share": 40.0128,
      "year": 1992
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1988–92",
      "reference": "Mean county swing",
      "share": 39.3706,
      "year": 1992
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1992–96",
      "reference": "National swing",
      "share": 48.8068,
      "year": 1996
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "1992–96",
      "reference": "Mean county swing",
      "share": 48.7715,
      "year": 1996
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1992–96",
      "reference": "National swing",
      "share": 47.5273,
      "year": 1996
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "1992–96",
      "reference": "Mean county swing",
      "share": 44.9261,
      "year": 1996
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "1996–2000",
      "reference": "National swing",
      "share": 44.7898,
      "year": 2000
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "1996–2000",
      "reference": "Mean county swing",
      "share": 46.3169,
      "year": 2000
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "1996–2000",
      "reference": "National swing",
      "share": 32.1555,
      "year": 2000
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "1996–2000",
      "reference": "Mean county swing",
      "share": 31.4166,
      "year": 2000
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "2000–04",
      "reference": "National swing",
      "share": 61.5786,
      "year": 2004
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "2000–04",
      "reference": "Mean county swing",
      "share": 61.8112,
      "year": 2004
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "2000–04",
      "reference": "National swing",
      "share": 54.1921,
      "year": 2004
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "2000–04",
      "reference": "Mean county swing",
      "share": 53.7424,
      "year": 2004
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "2004–08",
      "reference": "National swing",
      "share": 56.5228,
      "year": 2008
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "2004–08",
      "reference": "Mean county swing",
      "share": 56.082,
      "year": 2008
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "2004–08",
      "reference": "National swing",
      "share": 43.8664,
      "year": 2008
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "2004–08",
      "reference": "Mean county swing",
      "share": 43.4811,
      "year": 2008
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "2008–12",
      "reference": "National swing",
      "share": 73.2563,
      "year": 2012
    },
    {
      "basis": "Votes",
      "n": 3114,
      "pair": "2008–12",
      "reference": "Mean county swing",
      "share": 72.986,
      "year": 2012
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "2008–12",
      "reference": "National swing",
      "share": 58.8311,
      "year": 2012
    },
    {
      "basis": "Counties",
      "n": 3114,
      "pair": "2008–12",
      "reference": "Mean county swing",
      "share": 58.2531,
      "year": 2012
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "2012–16",
      "reference": "National swing",
      "share": 33.9675,
      "year": 2016
    },
    {
      "basis": "Votes",
      "n": 3112,
      "pair": "2012–16",
      "reference": "Mean county swing",
      "share": 34.1673,
      "year": 2016
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "2012–16",
      "reference": "National swing",
      "share": 24.5823,
      "year": 2016
    },
    {
      "basis": "Counties",
      "n": 3112,
      "pair": "2012–16",
      "reference": "Mean county swing",
      "share": 23.6183,
      "year": 2016
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "2016–20",
      "reference": "National swing",
      "share": 69.1492,
      "year": 2020
    },
    {
      "basis": "Votes",
      "n": 3113,
      "pair": "2016–20",
      "reference": "Mean county swing",
      "share": 69.1415,
      "year": 2020
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "2016–20",
      "reference": "National swing",
      "share": 73.8516,
      "year": 2020
    },
    {
      "basis": "Counties",
      "n": 3113,
      "pair": "2016–20",
      "reference": "Mean county swing",
      "share": 73.8837,
      "year": 2020
    },
    {
      "basis": "Votes",
      "n": 3111,
      "pair": "2020–24",
      "reference": "National swing",
      "share": 73.1326,
      "year": 2024
    },
    {
      "basis": "Votes",
      "n": 3111,
      "pair": "2020–24",
      "reference": "Mean county swing",
      "share": 80.0284,
      "year": 2024
    },
    {
      "basis": "Counties",
      "n": 3111,
      "pair": "2020–24",
      "reference": "National swing",
      "share": 75.5706,
      "year": 2024
    },
    {
      "basis": "Counties",
      "n": 3111,
      "pair": "2020–24",
      "reference": "Mean county swing",
      "share": 86.3388,
      "year": 2024
    }
  ],
  "id": "share_near_national_swing",
  "notes": [
    "Full counts of votes: there is no sampling, so the estimates have no confidence interval.",
    "A county is near the national swing if its own swing differs from it by less than {fact:band} points."
  ],
  "source": "County presidential returns, 1868-2024 (Algara and Amlani for 1868-2020, MIT Election Data and Science Lab for 2024); full counts, not survey estimates; county swings weighted by two-party votes in the later election unless stated",
  "spec": {
    "annotations": [
      {
        "label": "2012",
        "series": "National swing",
        "type": "point",
        "x": 2012,
        "y": 73.2563
      },
      {
        "label": "2024",
        "series": "National swing",
        "type": "point",
        "x": 2024,
        "y": 73.1326
      }
    ],
    "colors": {
      "Mean county swing": "cat2",
      "National swing": "cat1"
    },
    "n": "n",
    "series": "reference",
    "x": "year",
    "xDomain": [
      1868,
      2030
    ],
    "xLabel": "Later election of the pair",
    "y": "share",
    "yDomain": [
      0,
      100
    ],
    "yFormat": {
      "digits": 0
    },
    "yLabel": "Share of votes within 5 points (%)"
  },
  "subtitle": "Share of votes cast in counties whose swing is within {fact:band} points of the national swing, percent; one point per pair of consecutive presidential elections, plotted at the later election",
  "table": {
    "columns": [
      {
        "key": "basis",
        "label": "Counted by"
      },
      {
        "key": "pair",
        "label": "Pair of elections"
      },
      {
        "key": "reference",
        "label": "Reference swing"
      },
      {
        "format": {
          "digits": 1
        },
        "key": "share",
        "label": "Share within the band (%)"
      },
      {
        "format": {
          "digits": 0,
          "thousands": true
        },
        "key": "n",
        "label": "Counties"
      }
    ]
  },
  "title": "The share of votes near the national swing was {fact:votes_within_2012} in 2008 to 2012 and {fact:votes_within_latest} in 2020 to 2024, the two highest of {fact:n_pairs} pairs",
  "type": "line",
  "views": [
    {
      "filter": {
        "basis": "Votes",
        "reference": "National swing"
      },
      "id": "votes",
      "label": "Share of votes"
    },
    {
      "caption": "The line counts each matched county once and measures its swing against the national swing. It is highest in 2020 to 2024 and lowest in 1924 to 1928.",
      "filter": {
        "basis": "Counties",
        "reference": "National swing"
      },
      "id": "counties",
      "label": "Share of counties",
      "spec": {
        "annotations": [
          {
            "label": "1924–28",
            "series": "National swing",
            "type": "point",
            "x": 1928,
            "y": 8.49822
          },
          {
            "label": "2020–24",
            "series": "National swing",
            "type": "point",
            "x": 2024,
            "y": 75.5706
          }
        ],
        "yLabel": "Share of counties within 5 points (%)"
      },
      "title": "{fact:counties_within_latest} of counties were within {fact:band} points of the national swing in 2020 to 2024, the most of any pair; in 1924 to 1928 the share was {fact:counties_within_1928}"
    }
  ],
  "width": "wide"
}