Trump, the frontrunner for the 2024 Republican presidential nomination, listened quietly to the arguments in front of a three-judge panel of the US Court of Appeals before he addressed reporters and warned of "bedlam" if his prosecution goes ahead. Impeached twice by the Democratic-controlled House of Representatives while in office, Trump was acquitted both times by Republicans in the Senate, and is scheduled to go on trial on March 4 on charges of conspiring to overturn the 2020 election won by Democrat Joe Biden.