Fox's Wallace says 'well-connected' Republican told him there's a 20 percent chance GOP will vote for impeachment

Fox's Chris WallaceChristopher (Chris) WallaceChris Wallace: Taylor testimony 'very damaging to President Trump' Republicans, Democrats brace for first public testimony in impeachment inquiry Intelligence panel Democrat: 'I think we will end up calling' some witnesses on GOP list MORE said a "well-connected" Washington Republican told him that there's a 20 percent chance enough Republicans will vote to remove President TrumpDonald John TrumpGOP senators balk at lengthy impeachment trial Warren goes local in race to build 2020 movement 2020 Democrats make play for veterans' votes MORE from office in an impeachment trial in the Senate.

Wallace mentioned his source's comments during an interview with acting White House chief of staff Mick MulvaneyJohn (Mick) Michael MulvaneyKent, Taylor say they're not 'Never Trumpers' after Trump Twitter offensive GOP counsel acknowledges 'irregular channel' between U.S. and Ukraine The Hill's 12:30 Report: Democrats open televised impeachment hearings MORE on "Fox News Sunday." 

Wallace cited an overwhelming House vote criticizing the president's policies in Syria and an op-ed by Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellGOP senators balk at lengthy impeachment trial Graham: Senate trial 'must expose the whistleblower' Graham says Schiff should be a witness in Trump impeachment trial MORE (R-Ky.) slamming Trump's decision to withdraw troops from that country.

He then said he had "talked to a very well-connected Republican in Washington, someone whose name you would know well, who says that if the House votes to impeach and it gets to a trial in the Senate, there's now a 20 percent chance enough Republicans would vote with Democrats to impeach the president."

The Fox anchor then asked Mulvaney if he was concerned about the president losing GOP support.

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"That’s just absurd," Mulvaney said. "The comment about the 20 percent is just a person who clearly doesn't know what they're talking about."

The acting chief of staff added that Trump knew his decision to withdraw troops from Syria would be controversial and wouldn't be "politically popular."

"The president is extraordinarily popular at home," Mulvaney said, emphasizing his likability in swing states. 

When Wallace said he was referring to GOP lawmakers distancing themselves from the president, Mulvaney responded, "They have to go home eventually as well."

Trump decided earlier this month to remove troops from Syria, which led to a Turkish invasion of northern Syria.

The decision sparked bipartisan backlash, with Republicans saying it had stabbed Kurdish allies now fighting with Turkey in the back while giving new leverage to ISIS, Russia and the government of Syrian President Bashar Assad.

Polls have indicated support for impeachment has grown since Speaker Nancy PelosiNancy PelosiOvernight Health Care: Trump officials making changes to drug pricing proposal | House panel advances flavored e-cig ban | Senators press FDA tobacco chief on vaping ban Speaker Pelosi, it's time to throw American innovators a lifeline Why Americans must tune in to the Trump impeachment hearings MORE (D-Calif.) announced an inquiry last month, with multiple polls over the past two weeks showing that a majority of respondents supported the impeachment of Trump. 

But it's still considered highly unlikely that many Republicans would back Trump's impeachment.