Donald Trump decided early in his presidency that the United States would stay in Nato, but told his Defence Secretary James Mattis to become its "rent collector".
Following a crunch meeting at the White House, to decide whether Trump was "in or out" of the alliance, the President was persuaded and told Mattis: "You can have your Nato."
The details have been disclosed for the first time in Fear: Trump in the White House, a book due to be published this week by Watergate journalist Bob Woodward.
It was also revealed that Trump may almost have started a conflict with North Korea in early 2018, when he proposed a tweet that "scared the daylights" out of Mattis. The tweet was never sent. According to the book, Trump's doctor had the President's schedule cut back because of "stress". And a picture emerged of Melania Trump as a key, and tough, behind-the-scenes player.
The dinner meeting to decide Nato policy was convened at the White House at 6.30pm on February 8, 2017 by then chief of staff Reince Priebus. US policy had to be settled ahead of a speech by Mattis in Munich a week later. Trump insisted on talking about the gossip of the day, until dessert, when Priebus said: "We've really got to deal with the Nato issue."