Jewish voters fear Zohran Mamdani’s influence on the Jewish community, should he win. They’re also worried about anti-Israel currents on the right.

Many online claimed Vance himself benefited from food stamps as a child, and accused him of hypocrisy, while other posts claimed members of his family benefited from food assistance programs.

The vice president speaks fondly of the 1920s, a period when the Ku Klux Klan was resurgent and many groups of ...