A former aide to Joe Biden is accusing the presumptive Democratic presidential nominee of sexually assaulting her during the early 1990s when he was a senator. WASHINGTON (AP) - Democratic presidential candidate Joe Biden on Friday emphatically denied all egations from a former Senate staffer that he sexually assaulted her in the early 1990s, declaring flatly “this never happened.” Biden’s first public remarks on the accusation by a former employee, Tara Reade, come at a critical moment for the presumptive Democratic nominee as he tries to relieve mounting pressure after weeks of leaving denials to his campaign. “I’m saying unequivocally, it never, never happened,” Biden said in an interview on MSNBC’s “Morning Joe.” Biden said he will ask