Jeb Bush continues to struggle to articulate a position on Iraq and separate himself from his brother's most unpopular policy. Ricardo Arduengo/AP hide caption

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Former President Bill Clinton campaigns before the 2014 elections for former Sen. Mark Pryor, center, and Mike Ross, right, the Democratic candidate for governor. Justin Sullivan/Getty Images hide caption

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When Mike Huckabee was governor of Arkansas, he tied a yellow ribbon around a bust of President Clinton at the Governor's Mansion. He said he would remove the ribbon when the federal government allows ARKids First to continue enrolling Medicaid-eligible applicants into the program. Chris Johnson/AP hide caption

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AFL-CIO President Richard Trumka: "Candidates can't hedge their bets any longer, and expect workers to rush to the polls in excitement." Alex Wong/Getty Images hide caption

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Gov. Scott Walker arrives at the First in the Nation Republican Leadership Summit in New Hampshire. Walker has long been a polarizing figure due to his epic battles with public employee unions, but a new poll this week shows a new and sizable drop in his approval rating. Darren McCollester/Getty Images hide caption

itoggle caption Darren McCollester/Getty Images