Federal authorities have charged a longtime aide to Donald Trump whose responsibilities included moving and carrying cardboard boxes in which the former president kept mementos and papers, Trump announced on social media Friday. The criminal case against Trump for alleged obstruction and mishandling of classified documents case is expected to be overseen at least initially by Judge Aileen M. Cannon — the federal judge in Florida who last year appointed a special master in the case and temporarily halted FBI access to classified documents taken in a court-approved search. Trump has denied any wrongdoing.