"At that meeting, or at any other time, did President Trump or his representatives discuss or suggest what you should say publicly, during the impeachment trial (if called as a witness), or in any later investigation about your conversations with him on January 6th?"

The panel cites multiple public reports about the heated exchange between McCarthy and Trump as the attack unfolded that it wants to learn more about.

CNN previously reported about an expletive-laced phone call between McCarthy and Trump while the Capitol was under attack on January 6 where Trump said the rioters cared more about the election results than McCarthy did.

The letter also cites an interview where McCarthy told a local California news outlet that on January 6 he had a "very heated" conversation with Trump where he told the then-President to "get help" to the Capitol.

In May 2021, McCarthy had told CNN's Manu Raju that "Sure," he'd be willing to testify about his conversations with Trump on January 6 if he were asked to by an outside commission.

McCarthy is the third Republican lawmaker whom the committee has requested cooperation from, following letters to Reps.

Scott Perry of Pennsylvania and Jim Jordan of Ohio in recent weeks.

Both Perry and Jordan have indicated they will not cooperate with the committee voluntarily, and CNN reported earlier Wednesday that even the panel is currently weighing its options to get members to comply.

At issue is determining a path that would give them the best opportunity to obtain the information and interviews they are looking for by using the powers of the committee at their disposal.

The committee is wrestling with whether they have the constitutional right to subpoena their fellow members, and if they do, if they have an enforcement mechanism in place that will ultimately lead to cooperation.

But Wednesday's letter makes clear that the committee will continue to seek information from their fellow members even as they deliberate what to do if Republicans continue to resist their overtures.

Thompson separately told CNN that the committee specifically wants to hear from McCarthy about why he gave a floor speech on January 13 where he said that Trump "bears responsibility" for the January 6 attack.

"We need to get him before the committee to just say, why did you make that statement?" Thompson said.