Donald Trump Candidates Nikki Haley Campaign Strategies Campaign Strategy Iowa Caucus Iowa Caucuses Primary Elections Ron DeSantis Debates Republican Debates Debate Topics Key Takeaways Joe Biden Rival Candidates Debate Performances State Primaries Vivek Ramaswamy Debate Town Hall January 6 Insurrection Conspiracy Theories Primary Ballot Trump's Influence Primary Debates Polling Campaign Trail Running Mate Candidate Selection Opposition to Nikki Haley Support for Nikki Haley Trump-Haley Ticket Primary Rivals Democracy Chris Christie GOP Anti-Trump Republicans Polls Trump's Grip on GOP Primary GOP Voting Contest in Iowa Trump's Lead in Iowa Caucuses Trump's Critics in the Race Haley and DeSantis as Trump's Competitors Support for Trump Primary Election Voters Trump vs Haley New Hampshire Primary Nomination Process Primary Candidates Opposition Candidates Supporters Rivalries Republican Presidential Nomination Government Spending Primary 2024 Republican Nomination Michael Haley Assassination Attempt J. D. Vance Republican National Committee Presidential Candidates 2024 US Presidential Election Debate Participants Debate Criteria Trump's Involvement Nominee