House Speaker Nancy Pelosi speaks to reporters during her weekly news conference at the US Capitol on Nov. 21 in Washington, DC. Alex Edelman/Getty Images

Democrats are "moving quickly" to impeach President Trump before Christmas, according to CNN's congressional correspondent Phil Mattingly.

Here are the next steps for Democrats:

The report: "At this moment and through the course of next week, Thanksgiving week, House Intelligence Committee staff are drafting a report of their findings based on the depositions, based on the public hearings we’ve seen to this point," Mattingly said. The articles of impeachment: The House Intelligence Committee will then send the report to the House Judiciary Committee, which will draft articles of impeachment, Mattingly said, adding that that committee could have public hearings of their own. The vote: There could be a committee markup of articles of impeachment in the second week of December. A vote on the House floor to impeach President Trump could come before Christmas.

"And it’s very clear they are moving quickly," Mattingly said. "One thing is certain at this time: Impeachment is happening."

He also pointed out that several key witnesses, like White House acting chief of staff Mick Mulvaney and former National Security Adviser John Bolton, have refused to testify.

While "there could be some movement on court cases related to someone like John Bolton sometime in the first or second week of December," Mattingly said that "Democrats have made clear they are not waiting on the courts."

"They are moving forward, and that means likely before the end of the year, likely before Christmas, the House Democrats will vote to impeach President Trump," he said.