Jamaal Bowman’s Loss Is the Start of a New Era

George Latimer ousted Representative Jamaal Bowman, a two-term leftist and critic of Israel, in what’s believed to be the most expensive congressional primary ever fought. For moderates hoping to check the power of the Squad in Congress, it was a joyous night; for the many progressives who hoped to save one of their most prominent politicians, it was a deeply dispiriting — if no longer shocking — turn of events.

Latimer was...