COSHOCTON, Ohio — These days, three souls bring Sam Bennett hope — his wife, Debbie; God, and President Trump. Like most of his neighbors in Coshocton — population 11,000 — Mr. Bennett hasn’t once looked back since voting for Mr. Trump in 2016. Mr. Bennett is a soft-spoken man of 60 with close-set eyes and an easy smile, devoted to Christ and the collection of mining artifacts in his kitchen. The support he showed Mr. Trump at the voting booth remained unshaken through the Stormy Daniels fiasco and the recent outcry over family separations — two moments when, Mr. Bennett...