Blockchain-based prediction platform Polymarket has opened trading on a series of contracts tied to the 2028 U.S. presidential race, including who will win the election as well as the Democratic and Republican nomination contests. The company is also offering a 4% annual yield on users’ balances in the new markets, an incentive aimed at keeping liquidity in positions that may remain open for more than three years. Early trading shows Ohio Senator JD Vance leading the main election market at 24 cents on the dollar, implying a 24% probability of victory, followed by California Governor Gavin Newsom at 15% and former President Donald Trump at 5%. Separate contracts cover the party outcome and individual nomination races, expanding Polymarket’s roster of long-dated political bets.