After President Trump gave Turkish president Recep Tayyip Erdogan the green light to invade northern Syria last weekend, thus unleashing chaos in the region, Trump wrote him a very strange letter. The message, obtained by Fox Business’s Trish Regan, carries a straightforward theme: that Erdogan should show military restraint. But the prose style and phrasing, which includes the lines “Don’t be a tough guy. Be smart!” are so surpassingly weird in a high-level diplomatic context that many wondered if the note was authentic. It is.