Rep. Jerry Nadler, the head of the House Judiciary Committee, said it would amount to a “cover-up” if Attorney General William Barr fails to release the entire special counsel’s report along with the underlying evidence that led Robert Mueller to his conclusions.

Because the Justice Department believes by law that a sitting president cannot be indicted, Congress needs to be able to see the Mueller report to fulfill its constitutional oversight duty, the New York Democrat said on Sunday.

“If that is the case, and they can’t hold him accountable, the only institution that can hold a president accountable is Congress, and Congress, therefore, needs the evidence and information,” Nadler said on “Fox News Sunday.”

“And for the (DOJ) to take the position that we’re not going to give information because he’s not indicted like a normal person who’s not indicted because of lack of evidence, is equivalent to a cover-up and subverts the only ability to hold the president accountable,” Nadler added. “And the president no more than anybody else cannot be above the law.”

Mueller turned in the report of his nearly two-year investigation into Russian meddling in the 2016 election and any collusion by Trump or his campaign associated last Friday.

Barr has said he plans to release as much of the report as he can to Congress as soon as this weekend – but he may just send lawmakers a summary of Mueller’s conclusions.

Nadler and other Democrats are also seeking the release of the underlying information that led Mueller to his findings.

Nadler was asked on CNN’s “State of the Union” if he would accept Mueller’s report at “face value.”

“We’re likely to see what Barr characterizes as the main conclusions of the Mueller report, and we’ll accept them, but subject to seeing all the underlying data,” Nadler said. “We have to make judgments, the American people have to make judgments, as to how founded those conclusions are or Barr’s summary of the conclusions are.”

“I am suggesting that people make judgments and those judgments could be right or wrong,” Nadler continued.

If the Justice Department doesn’t release the report, Nadler said he would consider using a subpoena to get it and would “absolutely” take the issue all the way to the Supreme Court.

“We’ll try to negotiate. We’ll try everything else first. But if we have to, yes, we’ll issue subpoenas to get that information,” he said.