President Donald Trump is barring transgender people from serving in the military “in any capacity.” He’s citing “tremendous medical costs and disruption.” Trump’s announcement on Twitter did not say what would happen to transgender people already in the military. The president tweeted that after consulting with “Generals and military experts,” the government “will not accept or allow Transgender individuals to serve in any capacity in the U.S. Military.” South Dakota Congresswoman Kristi Noem supports the Presidents move.

Noem says there have been discussions about these issues for some time.

A Rand Corp. study estimated that there are between 2,500 and 7,000 transgender service members on active duty and an additional 1,500 to 4,000 in the reserves.