The dream of a Jewish Republican speaker of the House is no more. With House Majority Leader Eric Cantor’s startling ouster in a primary election this week, the man who was on a track to be the highest-ranking Jewish official in American history now appears consigned to the status of a “Jeopardy” answer. His defeat has left Jewish organizations in both parties reeling, especially the GOP’s long-suffering Jewish coalition groups. Cantor was – and for now, remains – the No. 2 Republican in a conference of 233 lawmakers. But for Jewish Republicans, Cantor is a singular figure, the only Jewish...