Polymarket prediction markets currently favor JD Vance and Gavin Newsom as the leading candidates for the 2028 U.S. presidential election. JD Vance, a Republican, holds a 29% chance of securing his party's nomination, with a trading volume of $2.15 million. On the Democratic side, California Governor Gavin Newsom leads with 38% odds and $2.79 million in trading volume. The data, recorded on November 2, 2025, suggests a potential electoral showdown between Vance and Newsom, as both candidates gain momentum within their parties. Other potential candidates, including AOC, Trump, and public figures like LeBron James and Kim Kardashian, are currently trailing in the prediction markets.