My first go to litmus test is immigration. On that issue Trump would definetly have signed a legal immigration restriction measure like the Goodlate bill, or the Cotton Perdue proposal, but then he turns around in the state of the union and says he wants higher rates of legal immigration, and did fire Sessions the one cabinet member who seemed most aligned with the idea of less immigration, so I'd say on this issue rather mixed in terms of white nationalist.
He fired Sessions because he recused himself from the Russia matter. Something he said was the greatest regret of his administration, appointing Sessions. So again nothing having to with immigration and instead all about protecting himself.
He also seriously considered Kris Kobach to be his immigration czar. And that seems to have fallen through only because Kobach acted like a diva and wanted a huge list of demands and authority.
