… We don’t have an official definition of Trumpism, but we’re describing it here in terms of four areas where Trump is somewhat distinct from previous Republican presidents: (i) Anti-institutionalism (his attacks on the Justice Department and the media, for example); (ii) Economic protectionism (his wariness about international trade agreements); (iii) Foreign policy (his hostility to NATO); and (iv) immigration and race (the border wall, the travel ban).
Virtually all Republicans in elected office are generally aligned with the president and will support him in seeking a second term. But many Republican officials don’t fully (or really at all) embrace those four facets of Trumpism. That creates tensions between the president and people in his party that play out regularly in Washington. I’d put modern Republicans into five main groups (ordered roughly from most to least aligned with Trumpism): CONT.
Perry Bacon Jr., FiveThirtyEight