Marco Rubio leads trader consensus for the 2028 Republican vice presidential nomination at 31.5 percent in a fragmented early-cycle market, reflecting his elevated national profile as Secretary of State and Senate experience that positions him as a unifying figure with foreign-policy credentials. J.D. Vance trails at 8 percent amid positioning as a potential presidential contender, while names such as Marjorie Taylor Greene, Kristi Noem, and Thomas Massie draw support from distinct ideological or regional bases but lack comparable executive-branch visibility. Key differentiators include governing records, donor networks, and alignment with party priorities on trade, immigration, and foreign affairs. Consolidation behind one outcome could accelerate after the 2026 midterms through endorsements, primary polling trends, or signals from party leaders on ticket balance.