The Diplomat quotes VP and Scowcroft Center Director Barry Pavel on defense spending among NATO member countries:

NATO long ago fixed the standard for defense spending at 2 percent of GDP. Few meet the standard, but at Newport the NATO-European powers put everyone on notice that they’re really, truly serious about it. The small minority that already comply — Great Britain (for the moment) and Greece, alongside the United States — will “aim to continue to do so.” The majority that don’t vow to arrest further slippage. And they will “aim to increase defense expenditure in real terms as GDP grows,” and “aim to move towards the 2% guideline within a decade,” helping field viable forces.

Aim being the keyword — or, more accurately, the key diplomatic weasel word — in these passages. How many European allies will fulfill their commitment, and how many will avail themselves of the escape clause? Barry Pavel of the Atlantic Council observes charitably that the uptick in budgets is “not going to happen across the entire alliance, but it’s useful for framing incentives for some nations to start to contribute more.” And that tepid prediction comes from someone who’s presumably a NATO enthusiast.