President Joe Biden's performance in the first televised debate of the 2024 presidential election campaign was widely slated.Kevin Dietsch/Getty ImagesBiden's debate performance has led to mounting pressure for him to bow out of the presidential race.Experts said it's not too late, but a decision to drop out could lead to chaos, like in 1968.Biden could say he's not running, resign as president, or face delegate defections.Can the Democrats replace President Joe Biden at the top of the ticket?Following the president's fumbled debate performance on Thursday, this question could be on many people's minds.And as Business Insider has previously written, history can usually guide us on what could happen.In 1968, when President Lyndon B.