In a wide-ranging speech at a campaign rally Saturday night, President Donald Trump ramped up attacks against his opponent, Joe Biden, calling Biden the “dumbest of all candidates,” and went so far as to declare, “maybe I’ll sign an executive order that you cannot have him as your president.” “He is the worst candidate. The dumbest of all candidates,” Trump said of former Vice President Biden. “He is the worst candidate in the history of presidential politics.” Trump also expanded on his unproven claim that Biden is on drugs, stating, “they gave him a big fat shot in the a—…...