They're not fulfilling their 2% requirement negotiated in the '14 contract, but the Obama administration gave them 'til 2024 to meet it. The US contributes a little over 3.5% of GDP, but the way our economy is now growing, we could cut back to 2% and actually end up paying more than we are now.

That hinges largely on trade negotiations.
And when Pelosi, Schumer, John Kerry, and other diplomats under the Obama Administration, plus all the Democrat pundits in the media are all saying that Trump was brash, undiplomatic, overbearing, insolent, and stupid to present his case the way he did, that tells me that Trump did exactly the right thing, 'cause now the other countries are gonna up their ante. But it still sounds like 2024 is the deadline, and that needs to be changed to right now, this year!
And then there is the thing about Europe buying their oil and natural gas from Russia, the enemy we've sworn to protect them against. We get hit with the double whammy. Add our 130 billion dollar trade deficit with Europe. Besides our NATO contribution, they can use our deficit money to buy the energy from Russia.

We are now the largest oil and natural gas producer in the world. They should be gettin' their energy from us, since we're the ones who got their backs. And then we have sanctions and restrictions on Russia because of their Ukraine takeover, and Europe's buying energy from Russia stabs us in the back again and twists the knife.