President Joe Biden has initiated a survey to gauge Vice President Kamala Harris' popularity amidst concerns about his fitness for a second term and recent struggles in a debate against Donald Trump. Speculations suggest Biden might consider stepping down before the election, especially after his COVID-19 diagnosis. Polls show varying opinions on Harris as a successor, with Democrats more supportive than the general population. Meanwhile, alternative Democratic candidates like Cory Booker and Wes Moore are being considered if Biden withdraws, as betting odds increasingly favor Harris over Biden in the 2024 election.