Hayworth Launches GOP Primary Challenge to McCain

PHOENIX -- Former congressman and conservative talk-radio host J.D. Hayworth kicked off his campaign challenging Arizona Sen. John McCain on Monday, with the campaign slogan, "The Consistent Conservative."

Hayworth began his campaign with a rally in Phoenix followed by a three-day statewide tour. He received a boost from Minuteman co-founder Chris Simcox, who dropped out of the race Monday and endorsed Hayworth.

"I have the utmost admiration and respect for what John McCain has done in our country. But I have serious and profound disagreements with John about the choices he's made as our Senator."

The primary showdown between two well-known Arizona Republicans promises to be the toughest re-election battle of McCain's congressional career. The most controversial issue separating the two is immigration policy.

Conservatives in Arizona have long been skeptical of McCain, who carved out a niche as a maverick Senator working with Democrats on key issues.

McCain held his own campaign event at nearly the same time in nearby Tempe, with more than two dozen mayors from across the state vowing to support him.

Maricopa County Sheriff Joe Arpaio announced his support for Hayworth Monday.