President Donald Trump said in a New York Times interview on Thursday that he knows more about the “the big bills” in Congress “ than any president that’s ever been in office,” in response to comments that he does not understand legislation.

“I know the details of taxes better than anybody. Better than the greatest C.P.A. I know the details of health care better than most, better than most,” Trump said in the interview.

The New York Times interview conducted in Mar-a-Lago, the presidential resort in Florida comes only a week after the first legislative success of his presidency that was marked by the signing of the GOP tax bill.

The Hill reports that there have been reports in recent months indicating that Trump officials and lawmakers on Capitol Hill are expressing concern that Trump doesn’t fully understand his recent policy moves.

The Times reported in September that some officials were worried about Trump not understanding the Deferred Action for Childhood Arrives (DACA) program and that if he understood the full details he might change his mind.

Charles Schumer, the Senate Minority Leader, commented on Trump’s tweets on the bipartisan deal to extend key ObamaCare payments.

“Trump ought to know what he’s talking about when he tweets about bills, because on this one he has no understanding of what it’s about,” Schumer said.

In June The Times also reported that while in a White House meeting, a Republican Senator left the meeting with the impression that President Trump didn’t fully understand some basic parts of the plan.

On that report, Trump confidently replied that he knows the subject of healthcare “very well.”

“Some of the Fake News Media likes to say that I am not totally engaged in healthcare. Wrong, I know the subject well & want victory for the U.S,” Trump said in a tweet.