California's 12th congressional district in the context of "Emeryville, California"

An election for a seat in the United States House of Representatives took place in California's 12th congressional district on November 5, 1946, the date set by law for the elections for the 80th United States Congress. In the 12th district election, the candidates were five-term incumbent Democrat Jerry Voorhis, Republican challenger Richard Nixon, and former congressman and Prohibition Party candidate John Hoeppel. Nixon was elected with 56% of the vote, starting him on the road that would, almost a quarter century later, lead to the presidency.

First elected to Congress in 1936, Voorhis had defeated lackluster Republican opposition four times in the then-rural Los Angeles County district to win re-election. For the 1946 election, Republicans sought a candidate who could unite the party and run a strong race against Voorhis in the Republican-leaning district. After failing to secure the candidacy of General George Patton, in November 1945 they settled on Lieutenant Commander Richard Nixon, who had lived in the district prior to his World War II service.

Horace Jeremiah "Jerry" Voorhis (April 6, 1901 – September 11, 1984) was an American politician and educator who served five terms in the United States House of Representatives representing California from 1937 to 1947. A member of the Democratic Party, he represented the 12th congressional district in Los Angeles County. He was the first political opponent of Richard M. Nixon, who defeated Voorhis for re-election in 1946 in a campaign cited as the first example of Nixon's use of red-baiting tactics during his political rise.

Voorhis was born in Kansas, but the family relocated frequently in his childhood. He earned a bachelor's degree from Yale University (where he was elected to the academic honor society Phi Beta Kappa) and a master's degree in education from Claremont Graduate School. In 1928, he founded the Voorhis School for Boys and became its headmaster. He retained the post into his congressional career.