The rationale behind that comment should have been obvious, but just in case it's not, here's the argument. Trump is campaigning on a lot of things, some of them so incoherent that we're not entirely sure how to go about describing them, but one key part of his "platform" is a strong border.

"We either have a country, or we don't folks," he's particularly fond of saying.

In the first week of his official candidacy, he made America's porous border with Mexico a key element of the "Trump stump" - if you will - whipping supporters into a frenzy with stories about drug runners and Mexican rapists. His solution: build a wall.

Well it so happens that just a little over two months after Trump made that suggestion, that's exactly what Hungary's Viktor Orban did when the daily flow of Mid-East refugees over the Serbian border rose well into the several thousands. Not to put too fine a point on it, but the wall idea seems to work. Here's a look at the dramatic decline in migrants entering Hungary after Orban's razor wire fence was constructed: