 Meanwhile, former President Obama is coming to Joe Biden's defense after the president's week debate showing. On next Friday, the former president said, bad debate nights happen. Trust me, I should know. Obama added that this election is still a choice between someone who has fought for ordinary folks and someone who only cares about himself. His comments come after Obama's former campaign manager said the age difference between 81-year-old Biden and 78-year-old former President Trump seemed to be 30 years on the debate stage.