Who will Donald Trump endorse for the 2028 Republican presidential nomination?

As the dominant figure in Republican politics, Donald Trump's endorsement for the 2028 presidential race will reshape the primary contest. Predict which candidate will receive Trump's backing. Consider the influence of Trump's inner circle, loyalty dynamics within the GOP, and the political positioning of potential successors including JD Vance, Ron DeSantis, Vivek Ramaswamy, and others. This market resolves when Trump makes an official public endorsement for a 2028 Republican presidential candidate.