[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/03/10/art.mccain.closeup.jpg caption="John McCain scored another high-profile endorsement Wednesday."]Washington (CNN) - Another high-profile Republican is backing Sen. John McCain's bid for a fifth term in the Senate.
McCain's campaign announced Wednesday that former Florida Gov. Jeb Bush has endorsed the Arizona Senator.
"As we continue to face tough challenges both at home and abroad, America needs leaders like Senator John McCain in the United States Senate," said Bush. "John is a proven conservative leader committed to reducing taxes, fighting wasteful spending and keeping America safe."
McCain is facing a challenge on his right from former Arizona congressman and talk show host J.D. Hayworth.
Bush is the latest in a series of GOP stars to endorse McCain.
Former Massachusetts Sen. Mitt Romney, Massachusetts Sen. Scott Brown, former Alaska Gov. Sarah Palin, Minnesota Gov. Tim Pawlenty and Virginia Gov. Bob McDonnell are all backing McCain.