According to its 2016 manifesto, the Republican Party lies far from the Conservative Party in Britain and the Christian Democratic Union in Germany — mainstream right-leaning parties — and closer to far-right parties like Alternative for Germany, whose platform contains plainly xenophobic, anti-Muslim statements.

The Republican platform does not include the same bigoted policies, and its score is pushed to the right because of its emphasis on traditional morality and a “national way of life.” Still, the party shares a “nativist, working-class populism” with the European far right, said Thomas Greven, a political scientist at the Free University of Berlin who has studied right-wing populism. These parties position themselves as defenders of the “traditional” people from globalization and immigration, he said.

The difference is that in Europe, far-right populist parties are often an alternative to the mainstream. In the United States, the Republican Party is the mainstream.