Shadow campaigns: 7 Democrat candidates who could step in if President Biden drops out of 2024 race Fox NewsAs Biden digs in, some top Democrats want him out of the race this week CNNCracks emerge in Biden’s support among Democrats The HillRep. Lloyd Doggett becomes first Democrat in Congress to call for Biden's withdrawal from 2024 race The Associated PressTexas congressman becomes first elected Dem to call on Biden to withdraw from election: 'Too much is at stake' Fox News