Donald Trump’s getting the band back together. But this time they come with political baggage, conspiracy theories and, in some instances, criminal convictions. The former US president’s old acolytes are returning to the fold, eager to exert influence on his bid for the White House and have their say in a potential second administration. That poses a headache for his election campaign team, whose efforts to run a disciplined operation can be upended at any moment by the mercurial Trump. “Trump always wants to feel comfortable about the people who surround him and what better way to do that than...