Marco Rubio leads the 2028 Republican vice presidential nominee market due to his role as Secretary of State, foreign policy profile, and repeated speculation about a Vance-Rubio ticket if the vice president seeks the presidential nomination. Traders price Rubio highest because President Trump has publicly discussed pairing the two, Rubio has signaled support for Vance while focusing on his cabinet duties, and his recent Athens speech reinforced a statesmanlike image ahead of the November 2026 midterms. Vance trails significantly as frontrunner for the top spot, leaving room for other governors, senators, and Trump allies in a fragmented field. Midterm results, confirmation dynamics, and any shifts in Trump’s preferences could consolidate or disperse support before primaries begin.