Who will be the 2028 Republican VP nominee?

Prediction market odds, like those found in this market, often offer a different perspective than traditional polling. Polls capture stated preferences, while this market reflects what individuals are willing to *wager* on, potentially revealing more genuine beliefs. While both can be valuable, prediction markets can sometimes be more accurate, especially closer to the event, as they incentivize participants to consider all available information. The difference between prediction market probabilities and polling averages can vary significantly, with a typical 2.5 difference observed in comparable political events.

Prices on Polymarket and Kalshi can diverge due to several factors. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform has its own user base, trading limits, and fee structures, which can influence price discovery. Additionally, differing liquidity and trading activity on each platform can create temporary discrepancies. Currently, Polymarket currently favors Will Marco Rubio be the 2028 Republican Vice-Presidential nominee? at 29.5%, while Kalshi leans toward Will Marco Rubio be the nominee for the Vice Presidency for the Republican party? at 27.0%. These differences highlight the dynamic nature of prediction markets and the importance of considering multiple sources of information.

This market resolves around Nov 8, 2028, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on the official announcement of the Republican Vice-Presidential nominee by the Republican party. The market will determine which candidate was officially selected to run on the Republican ticket, as reported by major news outlets and official party statements. The outcome will be based on the nominee as confirmed by the party, not speculation or pre-convention announcements.

Numerous events could significantly impact this market. Major candidate announcements, shifts in polling data, and endorsements from influential figures could all cause price fluctuations. Unexpected events, such as a candidate dropping out of the presidential race or a significant political scandal, could also dramatically alter the probabilities. Furthermore, the performance of potential candidates in debates and primary elections will likely influence trading activity and, consequently, the odds within this market. Any news impacting the perceived viability of potential nominees will be closely watched by traders.