John McCormack Democratic John McCormack Democratic The 1966 United States House of Representatives elections was an election for the United States House of Representatives on November 8, 1966, to elect members to serve in the 90th United States Congress.

As the Vietnam War continued to escalate and race riots exploded in cities across the country, Johnson's popularity had fallen, and the opposition Republican Party was able to gain a net of 47 seats from Johnson's Democratic Party, which nonetheless maintained a clear majority in the House.

This was also the first election that occurred after the Voting Rights Act of 1965 became law, the first time since 1870 that a Republican won a House seat in Arkansas, and the first since 1876 that the party did so in South Carolina (after the same in a 1965 special election for the seat).

[2] Source: Election Statistics – Office of the Clerk 1 One vacancy due to refusal of House to seat Adam Clayton Powell Jr. (D-New York) Florida redistricted to adjust for demographic changes; in addition to minor boundary changes a district was removed from northern Florida, and Broward County was broken out into its own district.

[3] Ohio redistricted its at-large seat into a 24th district, splitting out the counties to the southwest of Dayton from the city itself, as well as moving a district in southeastern Ohio into the Columbus area.