A new poll and related market signals suggest Vice President JD Vance and Secretary of State Marco Rubio are close competitors for the 2028 Republican presidential nomination. Multiple outlets report that an Emerson College Polling survey of Republican voters shows Vance leading but with a narrow margin: Vance receives 36% support while Rubio follows at 35% in a hypothetical GOP primary matchup. Other reporting characterizes the two as “neck-and-neck” or “tied” nationally among Republican primary voters based on the same or similar polling results. Coverage also notes that Rubio has gained support in recent months, while Vance remains slightly ahead in the latest snapshot. In addition to polling, CNBC reports that odds for Rubio to become the GOP nominee are moving closer to Vance, citing Kalshi-related developments that reflect shifting expectations. Taken together, the articles describe a race with minimal separation between the two top potential contenders and highlight recent changes in Rubio’s momentum and Vance’s relative standing over time.