John J. Mearsheimer and Victoria Nuland | How Trump’s ‘bullying’ approach might affect NATO.

John J. Mearsheimer: Well, I think it's very important to understand that President Trump ran as a candidate against all of the international institutions that comprise the liberal international order.

That includes the World Trade Organization, the E.U., the IMF, the World Bank, and NATO. And he said as a candidate that NATO is obsolete. And what he would really like to do, my opinion, is take the Americans out of NATO, take the Americans out of Europe.

And he's using this issue of defense spending as a hammer to beat the Europeans over the head. But his ultimate goal is much broader.