Mitt Romney

20120424-212544-pic-248377587.jpg

A worker irons a banner ahead of a rally for Mitt Romney, a GOP presidential candidate, in Manchester, N.H., on Tuesday. (Associated Press)

Romney Details_Reps.jpg

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)

APTOPIX Romney 2012_Reps.jpg

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)

20120423-165402-pic-251896711.jpg

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)

Romney 2012_Live.jpg

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)

media_0469.JPG

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)