Back in 2013, when Donald Trump was, allegedly, mulling a run for the White House as a Republican, he wrote this in an op-ed for CNN on the global financial crisis:

We are now closer to having an economic community in the best sense of the term — we work with each other for the benefit of all.

I think we’ve all become aware of the fact that our cultures and economics are intertwined. It’s a complex mosaic that cannot be approached with a simple formula for the correct pattern to emerge. In many ways, we are in unchartered waters.

The good news, in one respect, is that what is done affects us all. There won’t be any winners or losers as this is not a competition. It’s a time for working together for the best of all involved. Never before has the phrase “we’re all in this together” had more resonance or relevance.

…

We will have to leave borders behind and go for global unity when it comes to financial stability.

And he paid obeisance to the leftwing mantra of “diversity is our strength”:

Europe is a tapestry that is dense, colorful and deserving of continued longevity and prosperity. There are many pieces that must be carefully fitted together in order to thrive.

A mere three years ago, Donald Trump held the same fairly conventional views of internationalism and open borders as Hillary Clinton and George Soros… not a surprise because he’s a lot more like them than he like anyone in the GOP.

This campaign season, and in his few lucid moments at his press conference in Scotland, Donald Trump has focused on building a wall between us and Mexico and given full-throated support to protectionism and tariffs and punishing companies that actually engage in a global economy. Friday he applauded Brexit and seemed to hope more nations would do the same.

Has he changed his mind? Probably not. You can’t change your mind when you don’t really believe in anything to begin with.