Caitlyn Jenner, the reality TV star and transgender icon, harshly called out President Donald Trump on Thursday for withdrawing the federal government's legal guidance on allowing transgender youths to use the restrooms of their choice in schools. "From one Republican to another, this is a disaster," Jenner, who was introduced at the Republican National Convention last year as "the world's most famous Republican," said on Twitter. "You made a promise to protect the LGBTQ community. Call me."