On April 18, 2012 Presidential hopeful Mitt Romney delivered what he called a "prebuttal to President Obama's convention speech" during a campaign stop in Charlotte, North Carolina. In this collection we look back at some of the most memorable moments on the campaign trail with Mitt Romney. UPI/Nell Redmond .
Republican candidate Mitt Romney makes a campaign stop at the Best Western Hotel while campaigning for the Iowa Caucus in Dubuque, Iowa on December 31, 2007. (UPI Photo/Laura Cavanaugh)