Republican presidential candidate, former Massachusetts Gov. Mitt Romney, center, arrives at Martha's Vineyard airport Saturday, Aug. 18, 2012 in West Tisbury, Mass., for fundraising ev

 

              Republican presidential candidate, former Massachusetts Gov. Mitt Romney, center, arrives at Martha
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, center, arrives at Martha's Vineyard airport Saturday, Aug. 18, 2012 in West Tisbury, Mass., for fundraising events. (AP Photo/Evan Vucci)