(SOUNDBITE) (English) U.S. PRESIDENT DONALD TRUMP, SAYING: "But I will say this, the Mueller report came out." In a sharp reversal Thursday, President Donald Trump said he would allow Attorney General William Barr to decide whether Special Counsel Robert Mueller can testify before Congress.

(SOUNDBITE) (English) U.S. PRESIDENT DONALD TRUMP, SAYING: "Well I'm going to leave that up our very great attorney general and he'll make a decision on that." The one-eighty comes after a Trump tweet on Sunday said Mueller should not appear before lawmakers.

Trump renewed his attack on Mueller, whose report said the president had repeatedly tried to impede his probe into Russia's role in the 2016 election.

(SOUNDBITE) (English) U.S. PRESIDENT DONALD TRUMP, SAYING: "Bob Mueller's no friend of mine.

I had conflicts with him." Trump spoke a day after a Democrat-led house panel voted along party lines to hold Barr in contempt of Congress for refusing to hand over an unredacted copy of Mueller's findings.

The vote by the House Judiciary Committee came hours after Trump asserted executive privilege to stop Democrats from seeing the full report and underlying evidence.

(SOUNDBITE) (English) REP.

JERRY NADLER, (D) NEW YORK, SAYING: "We are now in a constitutional crisis." Those comments by Judiciary chairman Jerry Nadler were backed up Thursday by House Speaker Nancy Pelosi.

(SOUNDBITE) (English) NANCY PELOSI, HOUSE SPEAKER, SAYING: "Yes, I do agree with chairman Nadler because the administration has decided that they're not going to honor their oath of office." The constitution grants Congress broad powers to investigate a president's actions.

Democrats are demanding to hear from Mueller himself, which Barr last week said he did not oppose.

Trump has denied any wrongdoing and vowed to fight all congressional subpoenas.

(SOUNDBITE) (English) U.S. PRESIDENT DONALD TRUMP, SAYING: "They are very divisive people.

Thank you so much."