Polling has been scant ahead of New York’s key contested congressional primaries on Tuesday, but bettors on Polymarket are focusing on predicting the winner of four contests — including three where socialist Mayor Zohran Mamdani has backed a candidate. Five-term incumbent Rep. Adriano Espaillat was listed as having a 57% chance of winning re-election on the prediction market, compared to a 45% chance for Mamdani-backed Democratic socialist insurgent Darializa Avila Chevalier i n the 13th House