Rep. Jamaal Bowman (D., N.Y.), just days away from the primary election that could define his political career, addressed the crowd defiantly. Flanked by Sen. Bernie Sanders (I., Vt.) and Rep. Alexandria Ocasio-Cortez (D., N.Y.) during a Saturday rally, Bowman warned his adversaries that they were about to experience the "power of the motherf—ing South Bronx."

There was just one problem: Bowman does not represent the South Bronx. ...

Despite the size disparity, Bowman has tailored his closing message almost entirely to left-wing residents in the Bronx—both within and outside of his district. By contrast, the two-term congressman has openly disparaged Westchester County residents—particularly the Jewish ones.