Biden, who has been stuck at his Wilmington home during the pandemic, also took questions from reporters for the first time in months after the Trump campaign accused him of hiding. But the gaffe-prone former lawmaker lashed out when one reporter mentioned his own mental deterioration at age 65 and asked Biden if he had been tested for cognitive decline. “You’re a lying dog face,” Biden said, apparently irritated that the reporter kept asking questions as he tried to leave the event, before adding that he was “constantly tested.” “All you gotta do is watch me and I can hardly...