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SAN FRANCISCO, CA - JULY 16: Republican presidential candidate and former Florida governor Jeb Bush speaks to workers at Thumbtack on July 16, 2015 in San Francisco, California. Republican presidential hopeful Jeb Bush toured Thumbtack, a consumer service company for hiring local professionals. (Photo by Justin Sullivan/Getty Images)
SAN FRANCISCO, CA - JULY 16: Republican presidential candidate and former Florida governor Jeb Bush speaks to workers at Thumbtack on July 16, 2015 in San Francisco, California. Republican presidential hopeful Jeb Bush toured Thumbtack, a consumer service company for hiring local professionals. (Photo by Justin Sullivan/Getty Images)

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    Jeb Bush and the Swift Boaters

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Jeb Bush and the Swift Boaters

Jake Tapper on the Swift Boat Veterans for Truth -- and why it matters that Jeb Bush supported them then but opposes Donald Trump's attacks on McCain now.

Jeb Bush and the Swift Boaters

Jake Tapper on the Swift Boat Veterans for Truth -- and why it matters that Jeb Bush supported them then but opposes Donald Trump's attacks on McCain now.