President Joe Biden, right, and Pennsylvania Sen. John Fetterman during an event in Philadelphia.AP Photo/Manuel Balce CenetaSen. John Fetterman leaped to Biden's defense after his poor debate performance last week."I refuse to join the Democratic vultures on Biden's shoulder after the debate," he wrote on X.Fetterman, who once faced his own bad debate, slammed pundits who said he'd lose in 2022.Pennsylvania Sen.