Democratic incumbents are facing spirited challenges Tuesday in at least two of New York’s congressional primaries, the latest proving ground in the fight by the progressive left against the party establishment.

U.S. Rep. Dan Goldman and U.S. Rep. Adriano Espaillat are both seeking to stave off candidates backed by Mayor Zohran Mamdani, the young democratic socialist who hopes excitement over his election last year will help reshape the city’s congressional delegation.

Goldman faces former city Comptroller Brad Lander while Espaillat faces another Mamdani pick, Darializa Avila Chevalier, a democratic socialist who once helped organize pro-Palestinian protests at Columbia University.

Meanwhile, Democrat Jack Schlossberg, the 33-year-old grandson of former President John F. Kennedy, is hoping to write his own chapter in Camelot lore as he competes in a crowded field for a seat being vacated by retiring U.S. Rep. Jerry Nadler. Mamdani has made no endorsement in that race.

The Kennedy scion is running in one of the country’s wealthiest congressional districts — covering much of the center of Manhattan — but faces questions about his lack of work experience against more seasoned opponents.