Article Photos: For Romney, Obama, long slog to nail-biter finish 4/6

  FILE - In this Feb. 26, 2008, file photo, then Democratic presidential hopefuls Sen. Hillary Rodham Clinton, D-N.Y., left, and Sen. Barack Obama, D-Ill., respond to a question during a Democratic presidential debate in Cleveland. Mitt Romney pulled the plug on his first presidential run on Feb. 7, 2008, and immediately served notice that he wasn't about to fade away. "I hate to lose," he told conservatives that day. Obama wasn't paying too much attention to Romney just then. The first-term Illinois senator was in a bare-knuckled brawl with Clinton for the Democratic presidential nomination and, if he got past the New York senator and former first lady, was calculating his odds of defeating Republican Sen. John McCain.(AP Photo/Mark Duncan, File)