Republican John McCain was first elected to Congress in 1982, representing the first congressional district of Arizona. In 1986 he was elected to the U.S. Senate, taking the place of Sen. Barry Goldwater. McCain is currently the senior senator from Arizona.
McCain will run for the Senate again this fall, facing Democrat Stuart Starky and Libertarian Ernest Hancock.
McCain was born Aug. 29, 1936 in the Panama Canal Zone, Panama. After graduating from the Naval Academy in 1958, he began working as a Naval aviator.
In 1967 McCain was shot down during a bombing mission over North Vietnam. He ejected from his plane, landed in a lake and was captured by his enemies.
McCain spent five and a half years as a prisoner of war before he was released.
McCain and his wife, Cindy were married in 1980. They have seven children and four grandchildren.
As a senator McCain is famous for the McCain-Feingold Act, which limits the amount of soft money that can be given to a candidate.
He is also known for speaking and voting against his own party, often described as a "maverick" senator.
McCain also offended Republicans when he said he would run as Sen. John Kerry's vice president. He later rescinded his comments.
He has recently been in the news for criticizing an ad that bashes Kerry's military achievements. McCain asked President Bush to condemn the ad -- he didn't.
Currently McCain is on the campaign trail with Bush and was unavailable for comment.
He and Bush made a stop in Phoenix on Aug. 11 at the Veterans Memorial Coliseum, where McCain defended Bush's presidency.
He defended the war in Iraq and praised Bush's leadership after Sept. 11, 2001.
The two also appeared in Florida and New Mexico during the trip.