Republican presidential candidate U.S. Senator John McCain (R-AZ) (C), his wife Cindy (L) and Florida Governor Charlie Crist (2nd R) arrive at a polling station during a campaign visit in St. Petersburg, Florida January 29, 2008, the day of the Florida primary. In a tight battle in Florida, McCain and Mitt Romney competed to stick each other with the "liberal" tag, a harsh smear among conservative Republicans whose votes could be decisive in Tuesday's voting for presidential contenders. REUTERS/Carlos Barria (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA)