Washington — A federal appeals court in the District of Columbia refused the Trump administration's request to put a hold on a requirement that it allow transgender people to enlist in the military starting on January 1.

The decision by the three-judge panel of the US Court of Appeals for the District of Columbia is the second appellate decision to go against the White House, meaning the issue may end up before the Supreme Court.

President Donald Trump tweeted in July that the federal government "will not accept or allow" transgender individuals to serve "in any capacity" in the military. That would reverse a 2016 policy change under President Barack Obama allowing transgender people to serve openly.

READ: Pentagon to allow transgender people to enlist in military

Trump later formally directed the Pentagon to extend indefinitely a ban on transgender individuals joining the military, and he gave Defense Secretary Jim Mattis six months to come up with a policy on how to deal with those currently serving.

Several legal challenges to that proposed ban are ongoing. The Pentagon has said the enlistment of transgender recruits will start January 1 and go on amid the legal battles.

At least four federal judges have refused to allow the ban to go into effect, including US District Judge Jesus G. Bernal in California. On Friday, Bernal rejected an administration request to throw out a lawsuit asking for the ban to be voided and issued a preliminary injunction against the ban going into effect.

The Justice Department has asked federal appeals courts to intervene and put the January 1 requirement on hold.

The DC-based appeals court and the 4th US Circuit Court of Appeals in Richmond, Virginia, both turned away the administration's request.

Administration officials "have not shown a strong likelihood that they will succeed on the merits of their challenge to the district court's order," the judges on the DC appeals court panel said.