TYRONE, Pennsylvania — Shirley Hall has always lived in this charming Blair County borough, located a few miles from the big city of Altoona and once the home of booming coal and paper mill industries. She has also been a Catholic all of her life and for most of it a registered Democrat, two attributes she says are, or at least were, a profound part of her identity.

She is still a Catholic, faithfully so, but last week when watching former President Donald Trump walk into the convention hall in Milwaukee just two days after being shot, she changed her voter registration on the spot.