(CNN) Sen. John McCain said Thursday the White House is realizing it made a mistake when President Trump announced a ban preventing transgender Americans from serving in the armed forces without first consulting the military.
The decision, announced by Trump on Twitter Wednesday morning, reversed a policy initially approved by the Defense Department under President Barack Obama that would allow transgender people to openly serve in the military. The policy was still undergoing final review when Trump announced the decision to walk it back.
McCain said Thursday that Defense Secretary James Mattis, who last month told Congress he would take six more months to study the issue, was surprised by the announcement.
"I think they realize they made a mistake," McCain said. "I think generally speaking, it's accepted you consult the Secretary of Defense before you make a decision that has to do with defending the nation. Mattis was going through a study that they'd done for six months, and he had just extended."
"I know what Mattis said, that he wanted to complete the study, and he was surprised," McCain added.
McCain's comments follow his rebuke of the new policy in a statement Wednesday. "There is no reason to force service members who are able to fight, train, and deploy to leave the military -- regardless of their gender identity," McCain said. "We should all be guided by the principle that any American who wants to serve our country and is able to meet the standards should have the opportunity to do so."
CNN has reported that Mattis was informed of the decision before it was made public, but that the announcement blindsided the Joint Chiefs of Staff.