As Capitol Hill began packing up for the holidays, an intriguing piece of gossip wended its way through House Democratic circles: Was Dan Goldman in primary trouble? Goldman, after all, is something of a rising star in the party: rich, handsome, and as comfortable in the green room as he is clashing with Kristi Noem in a committee hearing. Until recently, it was widely assumed that the sophomore congressman, who represents some of the wealthiest zip codes in Lower Manhattan and brownstone Brooklyn, would be a shoo-in for reelection. Then Brad Lander, the outgoing New York City comptroller, declared he would be challenging Goldman from the left—with the endorsements of Bernie Sanders, Elizabeth Warren, and perhaps most crucially, Zohran Mamdani, the city’s democratic socialist mayor-elect.