It's a fallacy that trump will protect shelters.
I didn't make that claim? Maybe you are not addressing me here, though; not sure.
My point is was that American women have no party; no candidate. And it's the most vulnerable womenlike youwho are paying the worst price for it. 
As for current federal policy I hope someone with more expertise than I can weigh in ( Bicker? ) but my understanding is that there is a ton of confusion right now and it hasn't been well tested in the courts yet. The Obama administration (with Julian Castro as HUD secretary, incidentally) implemented a TWAW policy, but current HUD secretary Ben Carson made remarks in that garnered some attention in September:
“During a recent meeting with local staff in San Francisco, I made reference to the fact that I had heard from many women’s groups about the difficulty they were having with women’s shelters because sometimes men would claim to be women,” Carson wrote.
“This made many of the women feel unsafe, and one of the groups described a situation to me in which ‘big hairy men’ would come in and have to be accepted into the women’s shelter even though it made the women in the facility very uncomfortable,” he added.
“My point was that we have to permit policies that take into consideration the rights of everybody, including those women,” Carson wrote.
“Our society is in danger when we pick one issue (such as gender identity) and say it does not matter how it impacts others because this one issue should override every other common-sense consideration,” Carson wrote Friday, adding, “we must always be vigilant not to override the common sense of our fellow Americans.”
www.politico.com/story/2019/09/20/ben-carson-defends-transgender-remarks-1506883
So who knows what the Trump admin will do. But I can say for sure that Warren's plan has lost her my vote and $$$ in the primary. I will vote for any candidate over Trump in the general.