Actually it seems to have come from his terrible awful no good VP.

http://foreignpolicy.com/2017/07/25/pence-working-to-reverse-pentagons-transgender-policies/

Vice President Mike Pence and his staff have been working quietly to get Congress to roll back the Defense Department’s year-old policy covering medical procedures for transitioning service members, according to sources.

In a flurry of last-minute activity, House Republicans have submitted three separate but identical amendments to the 2018 defense spending bill this week that would prohibit the Pentagon from using government money to “provide medical treatment related to gender transition.”

Although I agree that he probably he tweeted it this morning as a distraction. And by the way…

Opponents claim that costs for the medical treatments that transgender service members may pursue would cost the Pentagon more than $3.7 billion over 10 years. However, studies from the New England Journal of Medicine and the Rand Corp. show that projected costs would more likely fall between $24 million and $84 million over the same time period.

That’s quite a difference!