Former President Donald Trump has appealed a court order requiring his former Vice President Mike Pence to testify in a special investigator's inquiry into efforts to overturn the results of the 2020 presidential election, according to sources. Trump's attorneys filed the appeal following a ruling related to the Justice Department's investigation into attempts to undermine the 2020 presidential election, which Trump, a Republican, lost to Democrat Joe Biden. Final briefs in the appeal are expected by May 25, according to the initial timeline set by the court, which did not name the parties involved. Last week, Pence stated that he would not appeal a judge's order requiring him to testify before a federal grand jury about his discussions with Trump before the violent attack on the Capitol. The judge noted that Pence still has the option to refuse to answer questions regarding January 6.