Former Trump White House aide Peter Navarro has been ordered to report to a Miami prison on March 19 to begin serving a four month sentence for defying a subpoena from the Jan. 6 select committee.

Navarro, who is urging a federal appeals court to stay the sentence while he attempts to overturn his conviction, faces the prospect of becoming the first top adviser to Donald Trump to serve jail time for an offense related to the effort to subvert the 2020 election.

Navarro, 74, was convicted last year on two counts of contempt of Congress for refusing to provide documents and testimony to congressional investigators probing the root causes of the Jan. 6 attack on the Capitol. The committee subpoenaed Navarro in February 2022, and he quickly indicated he would refuse to comply, citing executive privilege. The House held Navarro in contempt two months later, and the Justice Department soon followed suit with criminal charges.