In this photo taken Monday, April 23, 2012, Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at Consol Energy Research and Development Facility in South Park Township, Pa. (AP Photo/Jae C. Hong)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney is joined by Sen. Marco Rubio, R-Fla., during a town hall-style meeting in Aston, Pa., Monday, April 23, 2012. (AP Photo/Jae C. Hong)
The "never worked a day in her life" outburst directed at Ann Romney, wife of Republican presidential candidate Mitt Romney, spurred defenders to rise up against Hilary Rosen, the longtime Democratic operative and flack who delivered the verbal blast. (Associated Press)
GOP presidential candidate Mitt Romney (right) talks to reporters on Monday, April 23, 2012, as he is joined by Sen. Marco Rubio, Florida Republican, during a news conference before a town-hall-style meeting in Aston, Pa. (Associated Press)
Analysis of campaign coverage by the Pew Research Center involving more than 11,000 news outlets says GOP candidate Mitt Romney received the lion's share of attention after the Michigan primary, when his nomination became "essentially inevitable." (Associated Press)
The political dogfight turned to dogs with the story of Ann and Mitt Romney strapping a crate onto the roof of their station wagon — with the dog inside — for a family vacation. "The dog loved it," Mrs. Romney said. (Associated Press)
**FILE** Republican presidential candidate and former Massachusetts Gov. Mitt Romney speaks Feb. 7, 2012, during an election night rally in Denver. (Associated Press)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a campaign stop in Charlotte, N.C., Wednesday, April 18, 2012. (AP Photo/Chuck Burton)