This weekend, on a two-hour drive to their son’s lacrosse tournament, Cathy and Jay Ingram, of Lancaster, Pa., healed some wounds left from the long and divisive presidential election.

Ms. Ingram, who backed Hillary Clinton, told her husband, a Donald Trump supporter, that the comments he made about evil emanating from anyone who supported Mrs. Clinton hurt her feelings. He told her he didn’t realize she was hurt at the time and didn’t mean it to be a personal attack. He apologized.

She...