At the Republican Jewish Coalition summit, leaders condemned Zohran Mamdani as a symbol of Democratic extremism. There were a number of villains at the Republican Jewish Coalition’s annual summit here this weekend. Tucker Carlson, who recently hosted avowed antisemite and white nationalist Nick Fuentes on his show, was lambasted by speakers as not being part of their MAGA movement. The phrase “Imagine if Kamala Harris were president,” said with relief, was uttered more than a few times. But the name that drew the loudest boos the entire weekend was one that, a year ago, would have been complet...