After he wrote a memoir detailing his attempts to delay certification of 2020 election results, the Democratic-led House Select Committee investigating the Jan. 6 attack at the Capitol has subpoenaed Peter Navarro, former Trump White House Trade Advisor.

Navarro marks the 80th subpoena of the committee. The committee has conducted interviews with over 500 witnesses, who have voluntarily cooperated in order to track down the subplots behind the deadly siege.

“Mr. Navarro seems to have information directly relevant the Select Committee’s inquiry into the causes of January 6th attack at the Capitol,” Rep. Bennie Thompson (D-Miss.), said in a statement. He has not been shy about his role and discussed with the ex-President the support for these plans.

NPR reached out to Navarro in order for comments.

According to the committee, public reports and Navarro’s book detail how he tried to delay Congress’s approval of President Biden’s win as well as overturning the results.

The panel stated that Navarro worked with Steve Bannon, a former Trump advisor, to create efforts to delay the certification process. Navarro described the Green Bay Sweep as his “last and best chance” to seize an election stolen from the Democrats.

Thompson quoted from Navarro’s in Trump Time: My Journal of America’s Plague Year, which he sent to Navarro in his email. In an interview, Navarro stated that Trump was also “on board” for the effort.

The committee stated that Navarro also published a three-part report titled the “Navarro Report” online. It contained misinformation and ties to false allegations of election fraud.

Thompson stated, “And, since you discussed these issues and others in your recently published work, in interviews with journalists, and, amongst other places, on a podcast,”

The panel asks Navarro to submit documents within two weeks (by February 23rd) and to testify in three weeks (by today, March 2nd).