US Studies Centre Associate Professor Brendon O’Connor says there is an “unedifying time” ahead for the United States if Donald Trump wants to re-establish himself as the “top Republican” candidate. “I suppose these legal issues, the issues to do with classified documents that he took to Mar-a-Lago and elsewhere – they will all be things that have the potential of slowing down his attempts to, I think, have a second crack at the presidency,” he told Sky News Australia.