He’s been pretty consistent. Go listen to his interview with Oprah in 1988. He’s saying very similar things to what he says today. He is basically running on that platform. He has changed on abortion but that’s a good thing (Or do you just like to argue with pro choice people just for the heck of it?)
He was a registered Democrat from 2001-2009, he was in the Reform party...
https://www.youtube.com/watch?v=rcUCLwWCihE