I would also remind everyone that in Trump we have a man who does not stand in front of a mirror for hours parsing every single word he plans to utter someday, and then writes it out or uses a tele-prompter to be certain he says it exactly as planned.
Therefore, the listener needs to use some common sense in interpreting what has been said.
Another way of putting this is that nobody, apart from Trump, knows what he really believes. He just says whatever he needs to say to close the deal. The nice thing about elections is that campaign promises aren't legal obligations. Trump can say whatever he needs to say to get elected, and then he'll get to do whatever he really wants to do.