By the numbers: NATO defense spending

President Trump arrives today at the annual NATO summit in Brussels fixated on the fact that most members are falling short of defense spending targets, going so far as to declare that the current state of affairs "just doesn't work" for the U.S.

Data: NATO; Chart: Andrew Witherspoon/Axios

The bigger picture: Trump isn't the first president to push Europe on defense spending, but the 2% figure only tells part of the story.