Support for President Trump among Republican lawmakers may be showing signs of strain after the latest revelation that the commander-in-chief asked then-FBI Director James Comey to scuttle a probe into former national security adviser Michael Flynn.

“It is important to get to the bottom of it,” said Rep. Mark Meadows (R-NC), chairman of the House Freedom Caucus and a member of the House Foreign Relations Committee. “We’ve got one standard, and we need to make sure that applies to everybody.”

Republican Rep. Jason Chaffetz (R-Utah), who oversaw the investigation into Hillary Clinton’s conduct during the Benghazi attack when she was secretary of state, sent a letter to acting FBI Director Andrew McCabe to release Comey’s notes on the conversation when Trump made the request about Flynn. He set a May 24 deadline for the materials to be handed over.

Chaffetz, chair of the House Oversight and Government Reform Committee, also said he’s prepared to subpoena the memos Comey wrote after his meetings with Trump.

House Speaker Paul Ryan’s office backed Chaffetz’s requests.

“We need to have all the facts, and it is appropriate for the House Oversight Committee to request this memo,” said Ryan spokeswoman AshLee Strong.

“If this is legitimately something that there was some kind of influence or pressure from Comey doing his work, I’m going to be very disappointed,” Rep. Mark Walker (R-NC), chairman of the conservative Republican Study Committee, told Politico.

But CBS News on Wednesday said it asked 20 GOP senators and representatives and anyone from the White House to appear during the two-hour broadcast of “CBS This Morning” but “all declined our invitation.”

.@CBSThisMorning reached out to 20 republican senators and representatives as well as to the White House to appear today — all declined pic.twitter.com/vIMMALxPXT — CBS News (@CBSNews) May 17, 2017

Still, the mood on Capitol Hill seems dire, with many Republicans fretting privately that the Flynn request and Trump’s divulging classified information to Russian officials during a White House meeting are sidetracking the GOP legislative agenda on health care and tax reform.

“I don’t think we can just shrug our shoulders and walk away from this one,” a top House Republican told Politico. “I don’t know where this goes.”

“If these allegations are true, it’s deeply troubling and it certainly opens up a new chapter that all of us have to consider very carefully,” Rep. Carlos Curbelo (R-Fla.) told the website. “We need to get to the truth as soon as possible. This weekly scandal, this weekly controversy is unhealthy for the country. It’s a major distraction for the country and it’s just bad for the psyche of every American.”

Sen. Lindsey Graham (R-SC) on Tuesday said he invited Comey to “tell his side of the story” at a Senate Judiciary Committee hearing.

“I think it would be good for him if he did. It would be good for the country,” Graham said.

Rep. Leonard Lance (R-NJ) encouraged Comey to appear.

“I hope Director Comey testifies before Congress as soon as possible,” he said, Politico reported.

The mood at the House Republicans’ conference meeting was anxious and subdued, with one source telling the Web site Axios that members appeared “shell-shocked.”

About the same time, Sen. Susan Collins (R-Maine) was telling Team Trump to get its act together.

“We cannot have this constant chaos and serious questions being raised virtually every single day. It is distracting from the ability to work on certain issues like health-care reform, and the administration needs to get its house in order,” Collins told Newsradio WGAN.

Rep. Justin Amash (R-Mich.) said that if the reports about Trump’s pressure on Comey are true, they would be grounds for impeachment.

Asked if he trusted Comey’s word or Trump’s, Amash said, “I think it’s pretty clear I have more confidence in Director Comey.”

House Speaker Paul Ryan, while promising a thorough investigation, defended Trump, saying people were out to get him.

“The last thing I’m going to do is prejudge anything. I’m a person who wants to get the facts . . . and follow the facts wherever they may lead,” Ryan said. “It is obvious there are some people out there who want to harm the president. But we have an obligation to carry out our oversight, regardless of which party is in the White House.”

Perhaps the strangest defense of the president came from Rep. James Comer (R-Ky.).

“Having spent time on Air Force One with the president, I can say that he jokes a lot,” Comer said. “Sometimes when you say a joke, everybody gets a joke. But when you write it on paper, it sounds very different.”

Meanwhile, Rep. Jason Chaffetz (R-Utah), chair of the House Oversight and Government Reform Committee, said Comey had been invited to testify.

And both the Senate Judiciary and Intelligence committees requested copies of memos written by Comey after his meetings with the president.