Senate Majority Whip John Cornyn (R-TX) joined this weekend the growing chorus of Republicans that have been casting doubt on the legitimacy of Special Counsel Robert Mueller’s Russia probe.

Former Attorney General Eric Holder tweeted on Friday, “Speaking on behalf of the vast majority of the American people, Republicans in Congress be forewarned: any attempt to remove Bob Mueller will not be tolerated.”

Cornyn retweeted Holder and simply added “You don’t,” suggesting that he may very well be open to the idea of removing the special counsel.

When Bloomberg’s Steven Dennis tweeted on Saturday that “[Cornyn]’s beef is with Holder, not Mueller,” Cornyn responded with “But Mueller needs to clean house of partisans.”

But Mueller needs to clean house of partisans https://t.co/g8SwgAKtfH — Senator JohnCornyn (@JohnCornyn) December 16, 2017

“Will you accept the findings of the Mueller probe as legitimate, @JohnCornyn?” asked Washington Post reporter Greg Sargent.

“Makes sense to me to wait to see what they are first,” Cornyn said.

Makes sense to me to wait to see what they are first https://t.co/9lCqpYujKN — Senator JohnCornyn (@JohnCornyn) December 16, 2017

These tweets from the Senate’s second top Republican reflect the GOP’s efforts to discredit Mueller and his investigation into President Donald Trump’s election campaign, which accelerated this week when the Justice Department released anti-Trump texts from an FBI agent who had been on Mueller’s team.

Republicans pounced on the texts, echoing Trump’s repeated talking points that Mueller was biased.

Republicans then hammered Deputy Attorney General Rod Rosenstein with questions about Mueller’s credibility during his House testimony on Wednesday. Rosenstein defended the special counsel, saying that he sees “no good cause” to fire Mueller and that his investigation was “not a witch hunt.”