2006 United States Senate election in Maine

The Rockefeller Republicans were members of the Republican Party (GOP) in the 1930s–1970s who held moderate-to-liberal views on domestic issues, similar to those of Nelson Rockefeller, Governor of New York (1959–1973) and Vice President of the United States (1974–1977). Rockefeller Republicans were most common in the Northeast and industrial Midwestern states, with their larger moderate-to-liberal constituencies, while they were rare in the South and West.

Indiana is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th state on December 11, 1816. It is bordered by Lake Michigan to the northwest, Michigan to the north and northeast, Ohio to the east, the Ohio River and Kentucky to the south and southeast, and the Wabash River and Illinois to the west.

Richard Green Lugar KBE was an American politician who served as a United States Senator from Indiana from 1977 to 2013. He was a member of the Republican Party.

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 Wayback Machine is a digital archive of the World Wide Web founded by the Internet Archive, a nonprofit based in San Francisco, California. Created in 1996 and launched to the public in 2001, it allows the user to go "back in time" and see how websites looked in the past. Its founders, Brewster Kahle and Bruce Gilliat, developed the Wayback Machine to provide "universal access to all knowledge" by preserving archived copies of defunct web pages.

Stuart Rothenberg is an American editor, publisher, and political analyst. He is best known for his biweekly political newsletter The Rothenberg Political Report, now known as Inside Elections. He was also a regular columnist at Roll Call and an occasional op-ed contributor to other publications, including The Wall Street Journal, The Washington Post, The New York Times, and The Orlando Sentinel.

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.

Olympia Jean Snowe is an American businesswoman and politician who was a United States Senator from Maine from 1995 to 2013. Snowe, a member of the Republican Party, became known for her ability to influence the outcome of close votes, including whether to end filibusters. In 2006, she was named one of America's Best Senators by Time magazine. Throughout her Senate career, she was considered one of the most moderate members of the chamber.

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.

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."