Standing outside a Walmart in Sterling Heights, Mich., the choice seemed simple to Heather Abro. She voted for President Donald Trump in 2016, “because I wanted to give someone who was not a politician a chance.” Besides, she “couldn’t connect” with Hillary Clinton: “I didn’t like her.” This year Abro, a 42-year-old high-school math teacher who identifies as Catholic and has voted for both parties in the past, will cast her ballot for Joe Biden.