who defeated the former U.S. Representative for 's 14 congressional district in the 2012 Florida Elections?
United States Senate election in Florida, 2012:  Incumbent Democratic U.S. Senator Bill Nelson won reelection to a third term, defeating Republican U.S. Representative Connie Mack IV by 13%, winning 55% to 42%. Connie Mack IV: Cornelius Harvey McGillicuddy (born August 12, 1967), popularly known as Connie Mack IV, is the former U.S. Representative for  's 14 congressional district , serving from 2005 to 2013.
Senator Bill Nelson