A trio of primary results in New York City this week is deepening a schism among Democrats over who should lead the party and determine its direction as the midterms approach — and as the 2028 presidential race looms not far beyond. The party’s left flank took a victory lap after insurgent candidates backed by New York Mayor Zohran Mamdani all won Tuesday night, knocking off a pair of House incumbents as well as the handpicked successor of a retiring congresswoman. The results pushed long-held