The Polarizers: Postwar Architects of Our Partisan Era–out in Dec, avail. now for pre-order. Stuff those stockings. https://t.co/FTG2giKggz — Sam Rosenfeld (@sam_rosenfeld) September 17, 2017 Polarizers by Sam Rosenfeld After WW2 Democrats and Republicans agreed on most issues. Each party was a broad church — there was diversity on both sides. But in the 50s…