For many years, specialists in universities believed that American political events could be explained by the methods of economics and political science. The recent lackluster jobs report, for example, showing just 120,000 private-sector jobs added in March, is precisely the sort of fact that these experts would find explanatory. They assumed that party politics didn’t really matter that much—that when it came, for example, to making decisions about economic policy, politicians of both parties, though they would disagree on some fundamental questions, acted rationally, listening to the views of their respective economic experts and attempting to carry out their recommendations in as much good faith as the sausage-making processes of party politics would allow.
