Donald Trump's comments on NATO: a boost for European defense? Former president and candidate Donald Trump has decided to venture into one of his old favorite areas, the controversy against NATO allies. Trump is reviving a traditional question for decades from all American leaders, a pressing demand for European allies to shoulder their share of the burden.

For the first time, the United States has been overtaken for its military spending since Poland is now on the top step of the podium with 3.9% of its GDP spent on defense.