The Congressional Committee investigating last year's uprising at the US Capitol sent a letter Tuesday to Fox News host Sean Hannity asking him to voluntarily submit information about the deadly riots. The letter was signed on January 6 by Committee Chairman Benny Thompson and Vice President Liz Cheney.

In their request, the two lawmakers said that communications with the committee suggest Hannity "had prior knowledge of President Trump and his legal team's January 6 plan" and that he told both the president and his staff. expressed concern. Representatives also believe the Fox News star was communicating with White House officials and other lawmakers during the riots and in the days after.

"These communications make you a fact witness in our investigation," he wrote Tuesday. "Thus, we write today to seek your voluntary cooperation on a specific and narrow range of factual questions."

Specifically, the committee said it received messages between Hannity and Trump, as well as their Chief of Staff Mark Meadows, that were sent between December 31, 2020 and January 20, 2021.

On the last day of December, Hannity reportedly texted Meadows:

"We can't lose the entire WH consular office. I can't see January 6th going the way they're being told. After the 6th [sic] they should announce that they're going to try to improve voting integrity." Will lead a nationwide effort for the cause. Go to Fl and watch Joe Mess Up everyday. Stay tuned. People will listen when he speaks."

On the eve of the rebellion, he reportedly also sent a message that said:

"I am very worried about the next 48 hours. With the counting of electoral votes scheduled for 1 pm on January 6, why were you worried about the next 48 hours?"

That same evening he texted Meadows: "Pence pressure. WH lawyers will be gone."

The Committee considers that it has been reviewed on the basis of communications that Hannity may have also had direct conversations with the former President on January 5.

During the riot, Hannity told Meadows that Trump should "... ask the people to peacefully [c]apit [o]l leave."

In Tuesday's letter, the two chairs of the committee said they would like to ask Hannity what they had with White House staff, if any, about the possibility of removing Trump from office under the 25th Amendment.

In the days following the rebellion, Hannity apparently spoke with Trump.

Cheney and Thompson wrote, "It appears you have a detailed understanding of President Trump's state of mind in the days following the January 6 attacks."

He also wrote to Meadows and Congressman Jim Jordan ahead of President Biden's inauguration:

"Guys, we have a clear path to land the plane in 9 days. He can't mention re-election. EVER. I didn't have a good phone call with him today. And even worse, I'm not sure why. What's left is do or say, and I don't like to know if it's really understood. Thoughts?"

The committee requested that Hannity send him the name of his attorney to set a time for a written interview, and it asked him to "preserve all records of such communications."