"Former Massachusetts Gov. Mitt Romney's

favorability rating has spiked since the 2008 presidential primary, according to a Pew Research Center poll released Wednesday," Politico reports. "The Republican's favorability rating has climbed to 40 percent — a 10-point increase over the past 16 months. The Pew poll found that 28 percent of Americans view him unfavorably and another 32 percent don't know."