The Democratic establishment needs to catch up with voters on Israel
Peter Beinart writes: To grasp the significance of Zohran Mamdani’s shocking victory in last month’s Democratic primary for mayor of New York, it’s worth recalling another upset, which took place 11 years ago and some 300 miles to the south, in a Republican congressional primary near Richmond, Va. In 2014 Dave Brat, a little-known economics professor at Randolph-Macon College, challenged Eric Cantor, who was then the House majority leader. Mr. Brat was outspent by a margin of more than 10…