Last week, the House of Representatives Select Committee delayed testimony by Jeffrey Clark because he had retained a new lawyer.
Clark did not immediately respond to requests for comment.
The congressional aide spoke on condition of anonymity.
Clark, the former acting head of the Justice Department’s civil division, was a proponent of Trump’s unfounded claims that Democrat Joe Biden’s victory in the November 2020 election was the result of fraud.
On Oct. 13, the committee announced it had issued a subpoena to Clark asking him to produce records and testify at a deposition by Oct. 29.
In announcing it had subpoenaed Clark, the panel said it needed to understand all the details about efforts inside the previous administration to amplify misinformation about election results.
In January, the Justice Department’s inspector general announced his office was launching an investigation into whether Clark plotted to oust then-Acting Attorney General Jeff Rosen so he could take over the department and help pursue Trump’s baseless claims by opening an investigation into voter fraud in Georgia.
A U.S. Senate Judiciary Committee report found Clark also drafted a letter he wanted Rosen to approve which urged Georgia to convene a special legislative session to investigate voter fraud claims.
Clark’s plan ultimately failed after senior department leaders threatened to resign in protest, the Senate investigation found.