WASHINGTON (AP) — Steve Bannon, a longtime ally of former President Donald Trump, asked the Supreme Court on Friday to delay his prison sentence while he fights his convictions for defying a subpoena from the House committee that investigated the attack on U.S. Capitol.

The request came after a federal appeals court panel rejected his bid to avoid reporting to prison by July 1 to serve his four-month sentence. It was addressed to Chief Justice John Roberts, who oversees emergency appeals from courts in Washington, D.C.

U.S. District Judge Carl Nichols had previously delayed Bannon’s prison term as he appealed but ordered him to turn himself in after an appeals court panel upheld his contempt of Congress convictions.

Bannon was convicted nearly two years ago of two counts of contempt of Congress: one for refusing to sit for a deposition with the Jan. 6 House Committee and the other for refusing to provide documents related to his involvement in Trump’s efforts to overturn his 2020 presidential election loss to Democrat Joe Biden.

Bannon has cast the case as politically motivated, and his attorney David Schoen has said the case raises “serious constitutional issues” that need to be examined by the Supreme Court.

His lawyer has also argued that the former adviser didn’t ignore the subpoena but was still negotiating with the congressional committee when he was charged. His previous attorney told him that the subpoena was invalid because the Republican former president has asserted executive privilege and the committee would not allow a Trump lawyer in the room.

In court papers, Bannon’s lawyers also argued that there is a “strong public interest” in allowing him to remain free in the run-up to the 2024 election because Bannon is a top adviser to Trump’s campaign.

A second Trump aide, trade adviser Peter Navarro, was also convicted of contempt of Congress. He reported to prison in March to serve his four-month sentence after the Supreme Court refused his bid to delay the sentence.

Courts have rejected his executive-privilege argument, finding Navarro couldn’t prove Trump had actually invoked it.

Bannon is also facing criminal charges in New York state court alleging he duped donors who gave money to build a wall along the U.S. southern border. Bannon has pleaded not guilty to money laundering, conspiracy, fraud and other charges, and that trial has been postponed until at least the end of September.