I'd like to point out that the political compass is a really bad construct for understanding politics. Ideology is made from smaller factors such as economics, tradition, religion, intellectualism, and other institutions. Fascism came out of socialist circles, as did Nazism. The modern political compass came out of the cold war and helped both sides justify themselves: the communists who wanted to be as far from the Nazis as possible and the Americans who wanted to be seen as the voice of the moderates. (Don't look at the Molotov-Ribbontrop pact or Jim Crow)

The Republican party promotes Right wing populism. Elements of that include autarky, isolationism and conservatism.

Fascism is a very specific ideology, and while the leader of the Republican party Trump has some things in common with it, he is not on the war path like a true fascist would be. He is less imperialist than previous presidents. He wants to pull out from NATO and abandon the Kurdish people in Syria. Again, Trump is a populist. He did not come out of socialist circles preaching an anti-elitist message.