President Obama stumped for gubernatorial candidate Tom Wolf this weekend in Philadelphia. Wolf's victory Tuesday was among the few bright spots for Democrats. Pablo Martinez Monsivais/AP hide caption

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Pablo Martinez Monsivais/AP

Supporters of Republican Sen.-elect Tom Cotton celebrate his win in Arkansas over incumbent Mark Pryor. The GOP picked up seven seats Tuesday, gaining control of the Senate. Justin Sullivan/Getty Images hide caption

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Justin Sullivan/Getty Images

Then-incumbent Rep. Frank Guinta, R-N.H., and then-Democratic challenger Carol Shea-Porter debate during a Sept. 2012 forum at St. Anselm College in Manchester, N.H. Guinta, who lost to Shea-Porter in 2012, is running for his old seat in 2014. David Lane/AP hide caption

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David Lane/AP

In N.H. Race, A Rematch Of A Rematch

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Idaho Republican House candidate Bryan Smith is trying to unseat eight-term GOP Rep. Mike Simpson. The May 20 primary is viewed as a contest of Tea Party vs. establishment. Kim Raff/AP hide caption

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Kim Raff/AP