And there is Gingrich the liberal. “The liberal revulsion toward him obscured how unorthodox — occasionally, how liberal — his conservatism was. The books then and now are full of heresy. He showed a willingness to criticize other Republicans, even Reagan at the height of his popularity. He advocated a health tax on alcohol to discourage drinking — social engineering, it’s called — and imagined government-issued credit cards that would allow citizens to order goods and services directly from the feds. He thought the government should run nutritional programs at grocery stores and give away some foodstuffs free. He was...