Former President Donald Trump has appealed a judge’s order requiring his former Vice President Mike Pence to testify in the special counsel’s investigation into Trump’s efforts to overturn the results of the 2020 presidential election, a person familiar with the matter said on Monday. Reuters.

Trump’s lawyers have filed an appeal following a ruling related to a Justice Department investigation into attempts to undermine the 2020 presidential election, which Trump lost to Democrat Joe Biden.

The case remains under seal. But a new sealed case emerged Monday in a federal appeals court in Washington, D.C., involving a grand jury case before Chief U.S. District Judge James Boasberg.

Final appeal materials must be filed by May 25, according to an initial schedule set by the court, which did not name the parties in the case.

Pence said last week that he would not appeal a judge’s ruling requiring him to testify before a federal grand jury about conversations he had with Trump before the deadly attack on the US Capitol.

In the March ruling, the judge also said that Pence could still refuse to answer questions related to Jan. 6.

Several attorneys for Trump did not immediately respond to a request for comment.

Special counsel Jack Smith, appointed by Attorney General Merrick Garland in November to lead two investigations into Trump, is presenting evidence to grand juries in two separate probes.

The first investigation looks at attempts to interfere with the peaceful transfer of power after Trump’s defeat of Biden in November 2020.

The second examines Trump’s retention of classified documents at his Mar-a-Lago estate in Florida after he left office in January 2021 and whether he tried to obstruct the Justice Department’s investigation.