2006 United States House of Representatives elections in California

The Democratic Party is one of two major contemporary political parties in the United States. Founded in 1828, it was predominantly built by Martin Van Buren, who assembled politicians in every state behind war hero Andrew Jackson, making it the world's oldest active political party. Its main political rival has been the Republican Party since the 1850s, with both parties being big tents of competing and often opposing viewpoints. Modern American liberalism — a variant of social liberalism — is the party's majority ideology. The party also has notable centrist, social democratic, and left-libertarian factions.

The Republican Party, also referred to as the GOP, is one of the two major contemporary political parties in the United States. The GOP was founded in 1854 by anti-slavery activists who opposed the Kansas–Nebraska Act, which allowed for the potential expansion of chattel slavery into the western territories. It has been the main political rival of the Democratic Party since the mid-1850s. Like them, the Republican Party is a big tent of competing and often opposing ideologies. Presently, the Republican Party contains prominent conservative, centrist, populist, and right-libertarian factions.

The Libertarian Party (LP) is a political party in the United States that promotes civil liberties, non-interventionism, laissez-faire capitalism, and limiting the size and scope of government. The party was conceived in August 1971 at meetings in the home of David F. Nolan in Westminster, Colorado, and was officially formed on December 11, 1971, in Colorado Springs, Colorado. The organizers of the party drew inspiration from the works and ideas of the prominent Austrian school economist, Murray Rothbard. The founding of the party was prompted in part due to concerns about the Nixon administration, the Vietnam War, conscription, and the introduction of fiat money.

The Peace and Freedom Party (PFP) is a left-wing political party with affiliates and former members in more than a dozen American states, including California, Colorado, Florida, Hawaii, Indiana and Utah, but none now have ballot status besides California. Its first candidates appeared on the 1966 New York ballot. The Peace and Freedom Party of California was organized in early 1967, gathering over 103,000 registrants which qualified its ballot status in January 1968 under the California Secretary of State Report of Registration.

The American Independent Party (AIP) is a far-right political party in the United States that was established in 1967. The AIP is best known for its nomination of former Democratic Governor George Wallace of Alabama, who carried five states in the 1968 presidential election running on a populist, hardline anti-Communist, pro-"law and order" platform, appealing to working-class white voters and widely understood by political analysts as having pro-segregationist or white supremacist undertones, against Richard Nixon and Hubert Humphrey. In 1976, the party split into the modern American Independent Party and the American Party. From 1992 until 2008, the party was the California affiliate of the national Constitution Party. Its exit from the Constitution Party led to a leadership dispute during the 2016 election.

The secretary of state of California is the chief clerk of the U.S. state of California, overseeing a department of 500 people. The secretary of state is elected for four year terms, like the state's other constitutional officers; the officeholder is restricted by term limits to two terms. The current secretary of state is Shirley Weber, who assumed the role following the resignation of Alex Padilla, who was appointed to become the U.S. Senator for California following Kamala Harris' resignation to become the Vice President of the United States.

California's 1st congressional district is a U.S. congressional district in California. Doug LaMalfa, a Republican, has represented the district since January 2013. Currently, it encompasses the northeastern part of the state. Since the 2022 election, it includes the counties of Butte, Colusa, Glenn, Lassen, Modoc, Shasta, Siskiyou, Sutter, and Tehama, and most of Yuba County. The largest cities in the district are Chico, Redding, and Yuba City.

The Democratic Party is one of two major contemporary political parties in the United States. Founded in 1828, it was predominantly built by Martin Van Buren, who assembled politicians in every state behind war hero Andrew Jackson, making it the world's oldest active political party. Its main political rival has been the Republican Party since the 1850s, with both parties being big tents of competing and often opposing viewpoints. Modern American liberalism — a variant of social liberalism — is the party's majority ideology. The party also has notable centrist, social democratic, and left-libertarian factions.

Charles Michael Thompson is an American politician serving as the U.S. representative for California's 4th congressional district since 1999. The district, in the outer northern portion of the San Francisco Bay Area, includes all of Napa County and parts of Contra Costa, Lake, Solano, Yolo and Sonoma Counties. Thompson chairs the House Gun Violence Prevention Task Force. He is a member of the Democratic Party.

The Republican Party, also referred to as the GOP, is one of the two major contemporary political parties in the United States. The GOP was founded in 1854 by anti-slavery activists who opposed the Kansas–Nebraska Act, which allowed for the potential expansion of chattel slavery into the western territories. It has been the main political rival of the Democratic Party since the mid-1850s. Like them, the Republican Party is a big tent of competing and often opposing ideologies. Presently, the Republican Party contains prominent conservative, centrist, populist, and right-libertarian factions.

The Peace and Freedom Party (PFP) is a left-wing political party with affiliates and former members in more than a dozen American states, including California, Colorado, Florida, Hawaii, Indiana and Utah, but none now have ballot status besides California. Its first candidates appeared on the 1966 New York ballot. The Peace and Freedom Party of California was organized in early 1967, gathering over 103,000 registrants which qualified its ballot status in January 1968 under the California Secretary of State Report of Registration.

In political science, voter turnout is the participation rate of a given election. This is typically either the percentage of registered voters, eligible voters, or all voting-age people. According to Stanford University political scientists Adam Bonica and Michael McFaul, there is a consensus among political scientists that "democracies perform better when more people vote."

California's 2nd congressional district is a U.S. congressional district in California. Jared Huffman, a Democrat, has represented the district since January 2013. Currently, it encompasses the North Coast region and adjacent areas of the state. It stretches from the Golden Gate Bridge to the Oregon border, and includes all of the portions of Highway 101 within California that are north of San Francisco, excepting a stretch in Sonoma County. The district consists of Marin, Mendocino, Humboldt, Del Norte, and Trinity Counties, plus portions of Sonoma County. Cities in the district include San Rafael, Petaluma, Novato, Windsor, Healdsburg, Ukiah, Fort Bragg, Fortuna, Eureka, Arcata, McKinleyville, Crescent City, and northwestern Santa Rosa.

Walter William Herger Jr. is an American politician who served as the U.S. representative for California's 2nd congressional district from 1987 to 2013. A member of the Republican Party, his district was the state's largest congressional district by area. It covered almost all of interior Northern California including Chico, Redding and Red Bluff. On January 10, 2012, Herger announced he would not seek re-election in November.

The Libertarian Party (LP) is a political party in the United States that promotes civil liberties, non-interventionism, laissez-faire capitalism, and limiting the size and scope of government. The party was conceived in August 1971 at meetings in the home of David F. Nolan in Westminster, Colorado, and was officially formed on December 11, 1971, in Colorado Springs, Colorado. The organizers of the party drew inspiration from the works and ideas of the prominent Austrian school economist, Murray Rothbard. The founding of the party was prompted in part due to concerns about the Nixon administration, the Vietnam War, conscription, and the introduction of fiat money.