President Trump called Wednesday on NATO member nations to increase their military spending to 4 percent of gross domestic product—doubling his previous demand that they meet targets of 2 percent by January. Trump’s comments, made during a tense NATO summit in Brussels, reportedly prompted the military alliance to call an emergency session to respond to the demands. The Washington Post reports Trump said the U.S. was prepared to “go it alone,” and threatened to “do his own thing” unless the target was met. On Wednesday, NATO Secretary General Jens Stoltenberg downplayed reports of tensions with Trump, even as he said NATO members were prepared to increase military spending.

Secretary General Jens Stoltenberg: “Of course, President Trump has a very direct language and message on defense spending, but fundamentally we all agree.”