British journalist Piers Morgan confronted pro-Biden social media influencer Harry Sisson on Thursday about how he continues to defend President Joe Biden’s mental fitness. Biden announced Sunday that he was withdrawing from the presidential race after calls from allies within his party to step aside following his disastrous June debate against former President Donald Trump. Morgan on “Piers Morgan Uncensored” asked Sisson why he persisted in claiming Biden still could be president even after the debate raised an avalanche of doubts about his cognitive capability. Read: DEI Takes Center Stage …