Donald Trump has filed an appeal against a court ruling that would force several of his former aides to testify before a grand jury as part of a criminal investigation into efforts to overturn the 2020 election. The appeal was filed with the US Court of Appeals for the District of Columbia Circuit, and the Justice Department has not commented on the appeal. This is one of several defeats the former president has suffered in his efforts to use executive privilege claims to block the testimony of former aides and allies.