When Kristen McDonald Rivet got to the county courthouse in Midland, Michigan, days after the Supreme Court overturned Roe v. Wade, she was floored by the size of the crowd that arrived to rally for abortion rights in the fairly conservative enclave near Saginaw.

Just a month earlier, after a leaked opinion foreshadowed what the court would decide, dozens joined a similar rally at the same place. This time, there were more than 500.