The Democratic Party has no Plan B if President Joe Biden decided to halt his 2024 re-election campaign, which could spark a messy intraparty battle. Biden's weak poll numbers and questions about his age have raised concerns, but he remains committed to seeking a second term. If Biden were to drop out, Democrats could pick another nominee at their convention or later, in line with party rules. Vice President Kamala Harris would not automatically replace Biden and other Democrats would likely enter the race. Despite the challenges, Democratic officials are united behind Biden.