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In this combo made from file photos, President Barack Obama, left, speaks at the University of Iowa in Iowa City, on April 25, 2012, left, and Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop in Wilmington, Del. on April 10, 2012. After all their liberal vs. conservative differences are spoken, Obama and Romney sound a lot alike when they are being described by the other guy or his campaign. That leaves voters the challenge of having to sort out what's real and what's been stretched out of proportion. (AP Photo/Carolyn Kaster, Evan Vucci, File)

Associated Press
In this combo made from file photos, President Barack Obama, left, speaks at the University of Iowa in Iowa City, on April 25, 2012, left, and Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop in Wilmington, Del. on April 10, 2012. After all their liberal vs. conservative differences are spoken, Obama and Romney sound a lot alike when they are being described by the other guy or his campaign. That leaves voters the challenge of having to sort out what's real and what's been stretched out of proportion. (AP Photo/Carolyn Kaster, Evan Vucci, File)
In this combo made from file photos, President Barack Obama, left, speaks at the University of Iowa in Iowa City, on April 25, 2012, left, and Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks during a campaign stop in Wilmington, Del. on April 10, 2012. After all their liberal vs. conservative differences are spoken, Obama and Romney sound a lot alike when they are being described by the other guy or his campaign. That leaves voters the challenge of having to sort out what's real and what's been stretched out of proportion. (AP Photo/Carolyn Kaster, Evan Vucci, File)
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