Washington — A former top aide to Donald Trump appeared Wednesday in federal court in Miami for testimony to a grand jury investigating potential classified-document mishandling and obstruction at the ex-president’s Palm Beach property, according to a person familiar with the matter. Taylor Budowich, who had served as a spokesman for Trump after his presidency and now runs a pro-Trump super PAC, confirmed his appearance on Twitter. The Florida grand jury is separate from a panel that had been meeting for months in Washington as a part of a Justice Department special counsel investigation into Trump over the retention of hundreds of classified documents at Mar-a-Lago and potential obstruction of the government’s efforts to reclaim the records.