Populism—the politics of resentment—is generally regarded as a right-wing phenomenon.
A lot of the discussion of President Trump’s election interprets his election as reflecting a significant change in the American electorate. I don’t think so. We see precursors of the Trump coalition in Ross Perot’s presidential bid, and Pat Buchanan’s, and even Ronald Reagan’s. Nativists have been a crucial, if variable, part of the Republican coalition since before the Civil War. And support for protective tariffs were a common feature of Republican platforms through at least World War II.
The first constitutional test of the new era will be answered less by Donald Trump than by Mitch McConnell (R-Ky.) and Paul Ryan (R-Wis.): namely, whether the congressional leadership delivers to the chief magistrate the news that Capitol Hill is not a subsidiary of the White House.