President Joe Biden will have to shore up his support among Democratic voters to remain competitive in the general election.Samuel Corum/Getty ImagesIndependent voters will be a significant force in the 2024 presidential election.Both Biden and Trump are competing hard for this highly coveted slice of the electorate.But Biden's most pressing challenge right now is convincing Democratic voters to stick with him.President Joe Biden is working to reassure wary Democrats that he'll be able to reorient his campaign and win the November general election after last month's disastrous debate.Despite Democratic calls for Biden to reevaluate his candidacy, he received a dose of good news on Saturday in the form of polling conducted by Bloomberg News/Morning Consult.The swing-state survey showed that the gap between former President Donald Trump and Biden narrowed to just two points — with Trump holding a 47% to 45% lead among registered voters.Most observers would assume that Biden could overtake Trump by wooing Independents on the fence.