Trump lashes out at 'paper tiger' Nato while re-upping Greenland claimUS President Donald Trump met Nato Secretary General Mark Rutte in January in Switzerland and is expected to meet him once more in Washington this week. Trump's remarks came ahead of a visit by the defence alliance's chief Mark Rutte scheduled for later this week. Trump went on to say that Nato members had "actually gone out of their way not to help." Nato Secretary General Mark Rutte, who Trump called "a great person," is expected in Washington this week. Discussing his displeasure with Nato, Trump said: "It all began with - if you want to know the truth - Greenland."