President Trump broke his promise to protect the rights of transgender students. During his campaign, he had promised to continue enforcing regulations to protect transgenders from discrimination in schools and the workplace. However, writes the New York Times, the Trump administration entirely revoked the guidance that had been issued under the Obama administration to schools on how to provide a safe environment for transgender students, including allowing them to use bathrooms according to the gender they identified with.
President Trump did not change any rules protecting transgenders because he can't. Unlike what most mainstream media headlines assert, President Trump did not rescind or revoke any rules protecting transgender students from gender discrimination. Jim Naureckas explains in CommonDreams.org that the protective rights for these students do not derive from the Obama guidance but from a federal law that was passed in 1972 that prohibits gender discrimination in public schools. Revoking the guidance does not change these laws.