Not a new theory. His populist elements (hardly a small part of his campaign) can't really be called conservative. In fact, that southern wall and a deportation force are going to be two huge federally funded projects. Add in massive infrastructure programs and tax cuts to further drive the debt through the ceiling and hang it all around the neck of the Republican government.
Donald Trump has never been a conservative and even made the point that it is the Republican party, not the conservative party.