Republican John McCain spent nearly $2.5 million during a two-month period ending on Sept. 30 in his bid to win a fifth term in the U.S. Senate.

A new poll shows that Republican John McCain holds a strong lead over Democrat Rodney Glassman in Arizona's U.S. Senate race.

Republican Sen. John McCain framed the porousness of America's borders as both a national security concern and a human rights issue Sunday in the only scheduled general election debate in Arizona's U.S. Senate race.

Sen. John McCain has squared off in a sometimes testy debate with a former Arizona congressman hoping to take his job. J.D. Hayworth portrayed McCain Saturday night as a flip-flopper on illegal immigration, while McCain painted his rival as a faux conservative who is lax with tax dollars.

A Maricopa County Superior Court judge in Phoenix has scheduled an initial hearing Monday in a lawsuit challenging the official description of a measure on state's November ballot.

It takes 10 to tango in CD3. Here's a list of the candidates to watch.

J.D. Hayworth is launching his first television ad targeting Sen. John McCain in their Republican primary fight.

The Greater Phoenix Chamber of Commerce released its list of Arizona House and Senate candidate endorsements on July 6.

A law firm associated with the Arizona Democratic Party is appealing a court ruling that threw out a complaint seeking to remove Sen. John Huppenthal from the ballot for Superintendent of Public Instruction.

Republican U.S. Senate candidate J.D. Hayworth's campaign is defending his role as a pitchman three years ago for a Florida company that consumer advocates have accused of airing misleading ads.