Photo: Sarah L. Voisin/The Washington Post/Getty Images Sometime in 2018, Republican legislators became obsessed with fair play in youth sports. It started when a trans high-school student won a track-and-field championship in Connecticut and Idaho legislator Barbara Ehardt decided she couldn’t let the same thing happen in her state. Claiming that trans girls, whom she referred to as “biological boys,” had a competitive advantage in girls’ sports, she drafted a bill that would bar them from “