Marco Rubio leads the Republican VP nominee market at 29.5% amid trader consensus on his Senate and Cabinet experience as Secretary of State, positioning him as a potential balance for frontrunners in the open 2028 presidential field. Greg Abbott follows at 10.5% on the strength of his Texas governorship and repeated re-election success, though he has ruled out a presidential bid. Other contenders trail significantly, reflecting fragmented support across MAGA-aligned figures, current officeholders, and outsiders. Key differentiators include foreign policy credentials, state executive records, and alignment with the eventual presidential nominee. Consolidation could hinge on post-2026 midterm developments, candidate announcements, and ticket-building dynamics once the top of the ticket clarifies.