Trump is an American nationalist in the vein of George Washington, Andrew Jackson, or TR.
Because we are today challenged on things, which in Teddy's day were still so sacrosanct, that they never really engaged Teddy's attention in a way to offset his focus on some legitimate complaints which did engage him.
Teddy's son, Archibald, was a stalwart Conservative in the late 1950s & early 1960s, in ways which reflected the dominant patriotic side of his father, as opposed to his father's sometime sympathies for the non-Marxist muckrakers.