The commitment to spend a percentage of GDP on defense has long been violated by Germany, which is obviously what CapeIrish is saying.
And, to pretend that other presidents talked about it like Trump did is a bit disingenuous, since you guys were crying in the streets about how much he talked about it ("He's trying to destroy NATO!! WAAAHHHH!!!")...and trying to paint him like he didn't know what he was talking about by being hyper-technical and criticizing him, while undermining the good he was trying to achieve.
Link: https://www.nato.int/cps/en/natohq/topics_67655.htm
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