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Former President Bill Clinton and his wife former Secretary of State Hillary Rodham Clinton attend the 37th Harkin Steak Fry, September 14, 2014 in Indianola, Iowa.
Former President Bill Clinton and his wife former Secretary of State Hillary Rodham Clinton attend the 37th Harkin Steak Fry, September 14, 2014 in Indianola, Iowa.

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    Former Sen. Tom Harkin endorses Hillary

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Former Sen. Tom Harkin endorses Hillary

John King, Jackie Kucinich and Ed O'Keefe on Hillary Clinton's most recent endorsement and the significance of it.

Former Sen. Tom Harkin endorses Hillary

John King, Jackie Kucinich and Ed O'Keefe on Hillary Clinton's most recent endorsement and the significance of it.