Presumptive Republican presidential nominee Mitt Romney greets supporters after he delivered remarks to supporters during the "Romney Plan for a Stronger Middle Class" bus tour, at El Palacio De Los Jugos, Miami, Florida on August 13, 2012. Romney's bus tour is traveling through four battleground states ( Virginia, North Carolina, Florida, & Ohio), holding fundraisers in advance of the November 4 general election. UPI/Gary I Rothstein