Donald Trump Joe Biden Kamala Harris Trump's Influence Candidate Support Trump Endorsement Candidate Profiles Democratic Party Impact on Candidates Biden Endorses Harris Delegate Support Biden's Support for Harris Trump's Endorsements Biden-Harris Campaign United Auto Workers Gavin Newsom Grassroots Mobilization Robert F. Kennedy Jr. Super PACs Hillary Clinton's Endorsement of Kamala Harris Michelle Obama Candidate Performance Robert F. Kennedy Campaign Dynamics RFK's Potential Endorsement of Trump Arizona Police Association Liz Cheney Impact of Endorsements Union Involvement Bipartisan Support Business Leaders for Harris Influence of Celebrities Donald Trump's Endorsement Liz Cheney's Endorsement Candidate Alliances Voter Engagement Trump's Endorsement Funding Candidate Endorsements Republican Endorsements for Democrats Influence of Social Media Trump's Influence on Robinson's Campaign Criticism Trump's Support for Begich Trump Influence Cuomo's Endorsements EMILY's List Fundraising Nikki Haley Republican Party Dynamics Political Endorsements Christine Serrano Glassner County Party Endorsements Candidate Selection Impact on Future Elections Biden's Endorsement Voter Mobilization Biden's Endorsement of Harris Election Outcomes Quid Pro Quo Joe Biden Endorses Harris Voter Perception Haley's Support for Trump Philadelphia Democratic Party Media Coverage UAW Endorsement