Nancy Pelosi, speaker of the United States House of Representatives during her weekly press conference on Thursday morning. Pelosi is asserting that Attorney General Robert Barr has committed a crime by lying to Congress.

House Speaker Nancy Pelosi said Wednesday that Attorney General William Barr should be held in contempt of Congress and "nothing is off table" regarding whether to impeach him.

Pelosi's comments at a Washington Post event came hours before the Democrat-led House Judiciary Committee was scheduled to vote whether to hold Barr in contempt for the Justice Department's refusal to give Congress special counsel Robert Mueller's unredacted Russia report and its underlying evidence.

"Yes, I think that the attorney general should be held in contempt," said Pelosi, the nation's top-ranking Democrat.

Washington Post TWEET

When the Post asked Pelosi, "Is impeachment of Mr. Barr on the table?" she responded: "Well, nothing is off the table."

"I wish everyone would take a deep breath and be almost prayerful about this," Pelosi added.

The committee is scheduled to hold the vote, which pertains to a contempt resolution and report, during a markup hearing at 10 a.m. ET, according to a press release from the panel. If the vote passes, the resolution and report will move to the full House, where Democrats hold a majority of seats.

Democrats have criticized Barr heavily for his handling of Mueller's report on Russia's election meddling, possible Trump-campaign coordination with the Kremlin and possible obstruction of justice by Trump. Their attacks only grew following Barr's appearances testifying before congressional committees, where some top Democratic lawmakers — including Pelosi — say the attorney general was untruthful.

"He lied to Congress," Pelosi said last week. "If anybody else did that, it would be considered a crime."

The White House did not immediately respond to CNBC's request for comment on Pelosi's remarks.