FILE - In this Jan. 3, 2017, file photo, House Speaker Paul Ryan of Wis. administers the House oath of office to Rep. Ryan Costello, R-Pa., during a mock swearing in ceremony on Capitol Hill in Washington. Democrats hope to enlist military veterans in another type of fight _ for majority control of the House. In the Philadelphia suburbs, former Air Force officer Chrissy Houlahan is challenging Costello in one of 23 districts where Democrat Hillary Clinton topped Trump in November. (AP Photo/Zach Gibson, File)
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