John Walsh

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Montana Gov. Steve Bullock, left, introduces his lieutenant governor, John Walsh, as his interim appointment to the U.S. Senate in Helena, Mont., on Friday Feb. 7, 2014. Walsh, standing beside his wife Janet Walsh, will replace U.S. Sen. Max Baucus, who was confirmed as the next ambassador to China. (AP Photo/Matt Volz)

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FILE - In this Jan. 7, 2013 file photo, Montana Lt. Gov. John Walsh speaks after his inauguration in Helena, Mont. Montana Gov. Steve Bullock said Friday Feb. 7, 2014 that he is appointing Walsh to serve out the term of Democratic U.S. Sen. Max Baucus, who will be leaving the seat to become the next ambassador to China. (AP Photo/Matt Volz,File)

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Montana Lt. Gov. John Walsh, right, remarks on his appointment to the U.S. Senate Friday, Feb. 7, 2014 by Montana Gov. Steve Bullock, left, during a press conference in the Montana capitol. Bullock appointed Walsh to serve out the term of Democratic U.S. Sen. Max Baucus, who will be leaving the seat to become the next ambassador to China. (AP Photo/Independent Record, Eliza Wiley)

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FILE - This Jan. 26, 2014 file photo shows Montana Lt. Gov. John Walsh speaking in Helena, Mont. Montana Gov. Steve Bullock said Friday he has appointed Walsh to serve out the term of Sen. Max Baucus, who will be leaving the seat to become the next ambassador to China. (AP Photo/Matt Volz, File)

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Lt. Gov. John Walsh defending himself in Helena, Mont., on Sunday, Jan. 26, 2014, against reports that he was reprimanded by the U.S. Army in 2010 for using his position as Montana adjutant general to solicit National Guard memberships to a private organization. Walsh, who is running for U.S. Senate, released more than 400 pages of his military records, saying they show the kind of leader that he is. (AP Photo/Matt Volz)