Who Won the Jewish Vote? The answer depends in part on what you mean by ‘Jewish’ American Jews are a hard-to-define religious and ethnic group spread across multiple U.S. Census categories, possessing last names from at least a dozen different languages and clustered in places that are often overwhelmingly non-Jewish. It takes a team of demographers and sociologists from the Pew Foundation years to determine a plausible American Jewish population figure, something they only attempt once per decade (even then there’s often dissension over the results). Anything less than a carefully designed, agenda-free national survey, or an exhaustive study of...