U.S. Sen.Bob Casey, D-PA, right, listens to Republican challenger U.S. Rep. Lou Barletta, during their first debate, Saturday Oct. 20, 2018, in the studio of WPVI-TV in Philadelphia. Casey, 58, of Scranton, is seeking a third six-year term. Barletta, 62, of Hazleton, is in his fourth term in Congress. (AP Photo/Jacqueline Larma)
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