he House committee investigating the riot at the Capitol subpoenaed Trump White House counsel Pat Cipollone following explosive testimony from a former White House aide who said Cipollone raised concerns about Donald Trump's plans on Jan. 6, 2021.

“The Select Committee’s investigation has revealed evidence that Mr. Cipollone repeatedly raised legal and other concerns about President Trump’s activities on January 6th and in the days that preceded," the committee's chair, Rep. Bennie Thompson, D-Miss., and its vice chair, Rep. Liz Cheney, R-Wyo., said in a statement. 

The two lawmakers referred to Cipollone's "earlier informal engagement with our investigation" in April but insisted that the committee needed to hear from him "on the record."

"Any concerns Mr. Cipollone has about the institutional prerogatives of the office he previously held are clearly outweighed by the need for his testimony,” the statement said.

NBC News has reached out to Cipollone for comment.

A lawyer familiar with Cipollone’s deliberations confirmed to NBC News that the subpoena was required for any consideration of transcribed testimony before the committee, and that Cipollone would now look at matters of privilege as appropriate, as first reported by The New York Times.