Vice President J.D. Vance and Health and Human Services Secretary Robert F. Kennedy Jr. remain locked in a near tie as the leading contenders for the 2028 Republican presidential nomination, with traders assigning them roughly equal implied probabilities. Vance benefits from his vice presidential platform and consistent leads in early national and state-level polling averages, while Kennedy draws support tied to his cabinet role and policy profile. Lower-priced options such as Marco Rubio, Tucker Carlson, and Ron DeSantis trail significantly, reflecting limited early momentum. The November 2026 midterms and any subsequent positioning by President Trump will likely influence separation among the field, as no candidate has formally entered the race.