On Wednesday afternoon, as Texas Gov. Greg Abbott briefed reporters about the school shooting in the town of Uvalde that left 19 children and two adults dead, he was approached by an unexpected speaker—his Democratic opponent in this fall’s election, Beto O’Rourke. The former El Paso congressman and presidential candidate, who had been waiting silently in an aisle seat in the school auditorium, walked up to the stage and began to challenge the governor. “You’re doing nothing,” O’Rourke said.