Former Trump aide Peter Navarro, who was convicted last year on two counts of contempt of Congress related to his defiance of a House January 6 Select Committee subpoena, will begin serving his four-month sentence starting March 19.

In January, Navarro was sentenced to serve four months in prison after he was found guilty in September for refusing to provide documents and testimony during the congressional investigation into the January 6 Capitol riot.

Navarro was ordered to report to a federal prison in Miami, Fla., by 2 p.m. next Tuesday, his lawyers wrote in a court filing late Sunday. The former Trump official, who led the effort to delay certification of the 2020 presidential election, is now asking a federal appeals court to stay the sentence while he attempts to overturn his conviction.

“Accordingly, Dr. Navarro respectfully reiterates his request for an administrative stay,” the court papers state. “Should this Court deny Dr. Navarro’s motion, he respectfully requests an administrative stay so as to permit the Supreme Court review of this Court’s denial.”

Navarro made the request to a three-judge appeals court panel after U.S. district judge Amit Mehta, who presided over his case, rejected the possibility for a stay while the appeals process plays out. If his reiterated request fails, the 74-year-old could become the first top Trump adviser to serve jail time over alleged efforts to overturn the 2020 election results.

Navarro’s attorneys cited executive privilege, which grants members of the executive branch the right to withhold documents or information from the legislative and judicial branches, as defense for why their client refused to comply with the January 6 Committee’s investigation. Mehta disagreed with their argument, ruling that Navarro’s appeal shouldn’t warrant his temporary release.

Navarro claimed that former president Donald Trump convinced him to invoke executive privilege, but the judge found that the claim couldn’t be substantiated.

Navarro’s case is similar to that of former White House strategist Steve Bannon, who was also convicted on two counts of contempt of Congress and sentenced to four months in prison for defying a subpoena from the January 6 Committee. However, a separate judge ruled that Bannon can remain free pending appeal of his conviction due to executive privilege. Bannon has yet to serve any jail time.

In June 2022, a federal grand jury indicted Navarro after the House referred his case to the Department of Justice. At the time, the January 6 Committee believed Navarro and Bannon worked together to withhold sensitive information stemming from their efforts to subvert President Joe Biden’s electoral victory in 2020.