The Republican candidates for president were remarkably unified in the (few) policy preferences they espoused at their debates on Wednesday night. All support cutting taxes and reducing regulation, and all oppose crony capitalism. The candidates may be remarkably diverse in terms of ethnicity and race: Ted Cruz and Marco Rubio are Hispanic (and, apparently, so is Jeb Bush); Ben Carson is black; Bobby Jindal is Indian, etc. But ideologically speaking, they’re a pretty homogeneous bunch. 

The Democrats, meanwhile, find themselves in the opposite situation. Their presidential candidates are all over 50 years old and white. (At least by today’s definition of white.) But there’s a decent amount of ideological diversity among them. Sanders is a socialist; Clinton, as she put it, “represent[s] Wall Street.” O’Malley opposes the death penalty; Clinton supports it.