is probably due to Trump himself as a personality, in a way that I don't think extends to his progeny. Ideologically it's in the direction of what was called paleoconservatism, Pat Buchanan being an example.

Here's what the wikipedia of paleoconservatism says-

According to the international relations scholar Michael Foley, "paleoconservatives press for restrictions on immigration, a rollback of multicultural programs and large-scale demographic change, the decentralization of federal policy, the restoration of controls upon free trade, a greater emphasis upon economic nationalism and non-interventionism in the conduct of American foreign policy".[8] Historian George Hawley states that although influenced by paleoconservatism, Donald Trump is not a paleoconservative, but rather a right-wing nationalist and populist.[9] Hawley also states that paleoconservatism is today an exhausted force in American politics,[10] but that for a time it represented the most serious right-wing threat to the mainstream conservative movement.[10]