If these voters are beginning to sound familiar, they should: Warren’s Middle American Radicals of the 1970s are the Donald Trump supporters of today. Since at least the late 1960s, these voters have periodically coalesced to become a force in presidential politics, just as they did this past summer. In 1968 and 1972, they were at the heart of George Wallace’s presidential campaigns; in 1992 and 1996, many of them backed H. Ross Perot or Pat Buchanan. Over the years, some of their issues have changed—illegal immigration has replaced explicitly racist appeals—and many of these voters now have junior-college degrees and are as likely to hold white-collar as blue-collar jobs. But the basic MARS worldview that Warren outlined has remained surprisingly intact from the 1970s through the present.