When Donald Trump goes low, Rudy Giuliani gleefully follows him. On Friday, the president’s lawyer continued to channel his boss’ playbook, lobbing crass personal insults at political opponents who’ve devoted their lives to public service. In an interview with the Huffington Post, Giuliani called former Vice President Joe Biden “a moron” and “a mentally deficient idiot.” He made the statement while discussing Trump’s chances of winning reelection in 2020, arguing that his boss would surely sail to victory, especially if Democrats nominated Biden as their candidate.