There's one government agency that the Washington Post says can push back on President Donald Trump, but they don't have long to do it.

Writing Monday, the Post explained that the Government Accountability Office has an appointee whose term expires in two months.

"The agency’s leader, Comptroller General Gene Dodaro, has about two months left in his term, and Trump will nominate his replacement, potentially scuttling some of the Government Accountability Office’s most forceful attempts at oversight — including by taking the White House to court if necessary," the report said.

Already, the agency has retained a law firm to navigate whether the White House is breaking the law over spending issues.

“They are looking at everything,” said a source when speaking to the Post.

Once Trump is able to appoint his own people to the post, the agency will be "defanged," the Post described.

Congress can send Trump a list of who they think should be appointed, but the president can ignore it and pick whomever he wishes.

Office of Management and Budget director Russ Vought has spent his first few months in the post claiming the GAO is illegitimate and that it "shouldn't exist" to begin with. Republicans in Congress already tried to kill funding to the agency so that they couldn't afford to sue the administration on behalf of Congress, the report said.

"But the agency has taken on more prominence in recent months. A federal appeals court in August held that only GAO had the standing to sue over violations of spending laws, cutting out the groups that claimed harm from Trump’s decisions," the report explained.

“If Trump nominates the next comptroller general — I don’t want to make a political thing out of it, but his track record about caring about oversight and independent evaluations is not terribly strong,” said Henry Wray, a former GAO lawyer and ethics counselor. “GAO is really the only truly independent source of executive branch oversight in government.”

The most recent legal example is Trump attempting to kill funding allocated by Congress before he was president. The GAO could step in and say that it violates the Impoundment Control Act.

Read the full report here.