I don't think those situations are comparable. There is precious little LGBTQ-rights legislation at the federal level, so there's nothing for the federal government to enforce when a shitty state-level government chooses to discriminate against LGBTQ folks. And it's not like Republicans in the federal government will let LGBTQ-rights legislation to pass.
LGBTQ rights are popular. Appropriate legislation could be drawn up and enforced. It would be an authoritarian move, certainly, but authoritarianism just won the election.
