That’s the key finding from a new research paper published by three leading political observers from the University of Arkansas, Vanderbilt University and the University of Virginia. In a dramatic shift from 50 years ago, Republicans in Congress overwhelmingly attended nonelite universities for undergraduate and postgraduate studies. At the same time, almost half of all Democrats graduated from an Ivy League institution or some other elite university for undergraduate or postgraduate work, a slight increase from the early 1970s. The trio put together a 50-year study of members of Congress and their educational backgrounds. They traced the arc from a...