Republicans have said that GOP members would unite against a Democratic move to remove Greene from her committee assignments and that such an effort would help Greene cast herself as a victim of partisan Democrats. Some Democrats called for her to be expelled from Congress. "McCarthy's failure to lead his party effectively hands the keys over to Greene - an anti-Semite, QAnon adherent and 9/11 Truther".
Greene is in the hotseat for having supported conspiracy theories and online calls for violence against Democrats - views that have drawn sharp criticism from Senate Republicans including leader Mitch McConnell, who warned against "looney lies and conspiracy theories".
"I condemn those comments unequivocally". "I need you to call your Representative and urge them to #StandWithMTG!"
One member of GOP leadership said he expected the leadership team to close ranks behind Cheney on Wednesday, including House Minority Leader Kevin McCarthy.
But Mr McCarthy accused Democrats of a double standard and of failing to hold their own lawmakers to account. As more and more information about Greene's past came out and as the congresswoman showed no remorse, the issue of keeping her on the committees became untenable. The House will vote on the resolution on Thursday.
House leadership bristled at the comparison to Omar."There's absolutely no analogy to any member on our side of the aisle, period", House Majority Leader Steny Hoyer said on Wednesday, according to pool reports.
Donald Trump is no longer in the White House, but the former USA president's influence is still keenly felt on Capitol Hill, where the January 6 rioting by his supporters has created deep divisions within the Republican Party.
Sen. Mitt Romney, R-Utah, echoed that sentiment on Tuesday, telling Capitol Hill reporters that Republicans "should have nothing to do with Marjorie Taylor Greene".
"The language she has used, in many respects, goes far beyond the remarks that Steve King made through the years", Hoyer said, referring to the former congressman from Iowa who McCarthy removed from committees after years of racist and white supremacist remarks.
Her sympathies for the fringe group Q-Anon were public knowledge when she first ran for a congressional seat in north-west Georgia past year. She previously "liked" a Facebook post claiming that the shooting at Marjory Stoneman Douglas High School in Parkland, Florida, in 2018, which killed 17 people, was a "false flag" operation, the watchdog group Media Matters reported.
Last month, Mrs Greene introduced a measure attempting to impeach US President Joe Biden, accusing him of corruption and abuse of power, which made her a heroine of the party's pro-Trump wing. Senator Todd Young of IN called her "nutty" and "an embarrassment". The ad accuses the Republican lawmakers of standing "with Q, not you", referencing the baseless QAnon conspiracy theory supported by Greene.
The Democratic resolution would boot Greene from the House Education and Labor, and Budget Committees. But the main damage she's doing is to the Republican Party and to her district.