The election of Donald Trump is a political earthquake with few direct precedents. Andrew Jackson’s election as a populist in 1832 is one possibility. As a novice to elected office, President Eisenhower’s election in 1952 has that in common but little else. Ideologically, Trump’s radical reforms permit a loose analogy with Ronald Reagan’s agenda in 1980, but President Reagan was an outward-looking and internationally engaged White House incumbent. Trump is decidedly inward looking and isolationist. His conversion into a normal presidential candidate has been remarkable. Trump’s intelligence and knowledge of the world of social media and TV entertainment gave him …

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