2006 California's 50th congressional district special election

Arizona is a state in the Southwestern United States. It is the 6th-largest and the 14th-most-populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the northwest, California to the west and the Mexican states of Sonora and Baja California to the south and southwest.

John Sidney McCain III was an American politician and United States Navy officer who served as a United States senator from Arizona from 1987 until his death in 2018. He previously served two terms in the United States House of Representatives and was the Republican nominee for president of the United States in the 2008 election, which he lost to Barack Obama.

The Democratic National Committee (DNC) is the governing body of the United States Democratic Party. The committee coordinates strategy to support Democratic Party candidates throughout the country for local, state, and national office, as well as works to establish a "party brand". It organizes the Democratic National Convention held every four years to nominate a candidate for President of the United States and to formulate the party platform. While it provides support for party candidates, it does not have direct authority over elected officials. When a Democrat is president, the White House controls the Committee. According to Boris Heersink, "political scientists have traditionally described the parties’ national committees as inconsequential but impartial service providers."

Larry Joseph Sabato is an American political scientist and political analyst. He is the Robert Kent Gooch Professor of Politics at the University of Virginia, where he is also the founder and director of the Center for Politics, which works to promote civic engagement and participation. The Center for Politics is also responsible for the publication of Sabato's Crystal Ball, an online newsletter and website that provides free political analysis and electoral projections.

A plurality vote or relative majority describes the circumstance when a party, candidate, or proposition polls more votes than any other but does not receive more than half of all votes cast.

The 109th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives, from January 3, 2005, to January 3, 2007, during the fifth and sixth years of George W. Bush's presidency. House members were elected in the 2004 elections on November 2, 2004. Senators were elected in three classes in the 2000 elections on November 7, 2000, 2002 elections on November 5, 2002, or 2004 elections on November 2, 2004. The apportionment of seats in the House of Representatives was based on the 2000 United States census.

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.

Francine Pocino Busby is a former member of the school board in Cardiff, California and was the chair of the San Diego County Democratic Party. She has four times been the Democratic candidate for Congress in California's 50th congressional district, in North San Diego County. In 2004, she ran unsuccessfully against incumbent Republican Congressman Randy "Duke" Cunningham. Before his term was up, Cunningham resigned due to his conviction on bribery charges, and Busby ran in the June 2006 special election to replace him; she lost to Republican Brian Bilbray, who again defeated her in the 2006 general election that November. She also ran unsuccessfully against Bilbray in 2010.

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.

Brian Phillip Bilbray is an American Republican politician who represented parts of San Diego County in the U.S. House of Representatives from 1995 to 2001 and again from 2006 to 2013.

Eric Scott Turner is an American businessman, motivational speaker, politician, and former professional football player, who previously served as the executive director of the White House Opportunity and Revitalization Council. Turner formerly served as a Texas state representative for the 33rd District, which includes part of Collin County and all of Rockwall County. Before entering politics, Turner was an American football cornerback who played in the National Football League (NFL) for nine seasons.

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.