Vice President JD Vance holds a double-digit lead over Secretary of State Marco Rubio in national polling averages for the 2028 Republican presidential nomination, with traders pricing Vance near 50 percent and Rubio around 16 percent. Rubio has repeatedly stated he has no plans to run in 2028 and would support Vance if he seeks the nomination, while neither candidate has declared and the contest remains far from formal primary activity. The October 31 resolution window falls before the November midterms, leaving minimal opportunity for polling shifts, endorsements, or campaign announcements that could alter the current frontrunner status. Trader consensus reflects these structural barriers, including Rubio’s public positioning and the compressed timeline, though a late-breaking development such as an unexpected candidacy announcement or significant polling reversal could still influence outcomes before the deadline.