Largest aggregate US House vote swings since 1894 (Updated June 19, 2011)

1932 21.1%, Dems win 97 seats, keep House majority gained in 1931 special elections
1938 17.9%, Repubs win 80 seats, almost doubling total to 169 after losing 1932 and 1936 landslides
2010 17.1%, Repubs win 63 seats, retake House majority after losing it in 2006 election
1922 15.8%, Dems win 75 seats, getting to 207 after losing 1920 in landslide
1948 15.4%, Dems win 85 seats, retake House majority after losing it in 1946 election
1920 13.4%, Repubs win 63 seats, keep House majority gained in 1918 election
1946 12.6%, Repubs win 56 seats, retake House majority for first time since 1931 special elections
1994 12.3%, Repubs win 54 seats, retake House majority for first time since 1954 election
1966 12.0%, Repubs win 47 seats, rebounding after 1964 landslide
1974 11.3%, Dems win 49 seats, keep House majority in wake of Watergate
2006 10.5%, Dems win 31 seats, retake House majority for first time since 1994 election
1942 10.2%, Reps win 47 seats, win majority of national aggregate House vote, but don?t win majority of seats
1912 10.2%, Dems win 62 seats, keep House majority with 45% of vote after Republican Party splits
1964 9.5%, Dems win 37 seats, keep House majority in wake of Kennedy assassination
1904 9.5%, Repubs win 54 seats, keep House majority in Teddy Roosevelt's landslide win

The Last Eleven House Majority Switches (Updated June 19, 2011)

2010 Repubs win 63 seats with 6.6% victory margin over Dems
2006 Dems win 31 seats with 7.9% victory margin over Repubs
1994 Repubs win 54 seats with 7.2% victory margin over Dems
1954 Dems win 19 seats with 5.1% victory margin over Repubs
1952 Repubs win 23 seats with 0.1% victory margin over Dems
1948 Dems win 85 seats with 6.2% victory margin over Repubs
1946 Repubs win 56 seats with 9.2% victory margin over Dems
1931 Dems take House after series of special election victories
1918 Repubs win 21 seats with 7.3% victory margin over Dems
1910 Dems win 56 seats with 4.5% victory margin over Repubs
1894 Repubs win 120 seats -- no aggregate vote totals available