Congress’ top Democrats are calling for special counsel Robert Mueller to appear before Congress “as soon as possible” to testify about his report on Russia election meddling and contacts with the Trump campaign.

House Speaker Nancy Pelosi and Senate Democratic Leader Chuck Schumer said in a statement Thursday that Attorney General William Barr’s “partisan handling” of Mueller’s report has “resulted in a crisis of confidence in his independence and impartiality.”

Barr is scheduled to release a redacted version of Mueller’s report Thursday after he holds a news conference about it.

Pelosi and Schumer criticized Mueller’s plan to “spin the report in a press conference” before allowing Congress and the public to see it. They said “the American people deserve to hear the truth.”