Jeb Bush Jeb Bush

Former Florida Gov. Jeb Bush had a tough week with his changing positions on the Iraq War and trying to explain whether he would have authorized it, knowing what we know now. Ross D. Franklin/AP hide caption

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Ross D. Franklin/AP

Candidates, and "un-candidates," for the presidency are slicing and dicing campaign-finance law, testing the boundaries of what's legal. TaxCredits.net via Flickr hide caption

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TaxCredits.net via Flickr

Republican presidential hopeful Sen. Marco Rubio, R-Fla., speaks Wednesday before the Council on Foreign Relations in New York, where he laid out his "Rubio Doctrine." Mary Altaffer/AP hide caption

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Mary Altaffer/AP

4 Questions For Republicans On Foreign Policy

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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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Ricardo Arduengo/AP

Then-President George W. Bush jokes with his brother Jeb, the then-Florida governor, in 2006. Jeb Bush has been asked before, and is sure to be again, how he would distinguish himself from his brother. Mari Darr~Welch/AP hide caption

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Mari Darr~Welch/AP

"Exploratory" Republican presidential candidate Jeb Bush speaks April 17 at the First in the Nation Republican Leadership Conference in Nashua, N.H. His super PAC — Right to Rise — is aiming to raise $100 million dollars by June 1. Brian Snyder/Reuters/Landov hide caption

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Brian Snyder/Reuters/Landov

17 Months Before Election Day, One Campaign Aims For $100 Million

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Former Florida Gov. Jeb Bush's campaign dismissed the no-new taxes pledge as something "circulated by lobbying groups" and he says he "will not sign." David Goldman/AP hide caption

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David Goldman/AP

Republican presidential hopeful Sen. Ted Cruz speaks at the Republican Leadership Summit Saturday in Nashua, N.H. Jim Cole/AP hide caption

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Jim Cole/AP

Candidates And Candidates-To-Be Woo New Hampshire's GOP

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Former Florida Gov. Jeb Bush is one of four "un-candidates" being targeted by liberal groups Campaign Legal Center and Democracy 21. They say the politicians have crossed the line into candidacy based on their activities in recent months. Scott Olson/Getty Images hide caption

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Scott Olson/Getty Images