Republican presidential candidate, former Massachusetts Gov. Mitt Romney, his wife Ann, center, and Gov. Bobby Jindal, R-La., right, talk with Sen. David Vitter, R-La., back to camera, during a tour of flooding caused by hurricane Isaac, Friday, Aug. 31, 2012, in Jean Lafitte, La. (AP Photo/Evan Vucci)

Photo by: Evan Vucci

Republican presidential candidate, former Massachusetts Gov. Mitt Romney, his wife Ann, center, and Gov. Bobby Jindal, R-La., right, talk with Sen. David Vitter, R-La., back to camera, during a tour of flooding caused by hurricane Isaac, Friday, Aug. 31, 2012, in Jean Lafitte, La. (AP Photo/Evan Vucci)