In this Tuesday, Jan. 3, 2017, file photo, U.S. Rep. Ryan Costello, R-Pa., participates in a mock swearing-in ceremony on Capitol Hill in Washington. Costello announced on Sunday, March 25, 2018, that he would not be seeking re-election, ending weeks of speculation about his future and boosting Democratic hopes of winning his House seat. (AP Photo/Zach Gibson, File)
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