Donors Calls for Resignation US Democrats Hollywood Influence Candidate Replacement Voters' Concerns Democratic Campaign Strategy Reactions to Biden's Performance Voter Perception Presidential Nominee Kamala Harris Candidate Support Internal Criticism Biden's Popularity Political Allies Reelection Concerns Biden Supporters Biden Administration Calls for Withdrawal Democratic Candidates Democrats Doubt Biden Congressional Democrats Party Unity Democratic Representatives Internal Party Opposition Voter Sentiment Endorsement of Kamala Harris Kamala Harris Support Vice Presidential Candidates Stephen King Electoral Strategy Political Challenges Florida