In true Trump style, it was revealed that in a call with Australian Prime Minister Malcolm Turnbull, Trump got angry and abruptly ended the call. The call caused such a fuss that Speaker Paul Ryan (R-Wis) had to come out and reiterate the strong relationship between the two countries.
At the National Prayer Breakfast this morning, Trump said of the calls: "Just don't worry about it. They're tough. We have to be tough. It's time we're going to be a little tough, folks. We're taken advantage of by every nation in the world, virtually. It's not going to happen any more."
I believe Trump's behavior is called "taking your ball and going home." I saw it on the playground when I was in third grade.