That’s NATO Secretary General Jens Stoltenberg’s request of Republican Presidential Primary candidate Donald Trump over Trump’s continued, bluntly phrased, pressure on NATO members to meet their spending commitment of 2% of GDP to NATO.

It isn’t Trump’s rhetoric that risks NATO destabilization, though. When Trump was President, he threatened US withdrawal from the alliance if the other member nations didn’t start meeting that commitment. At the time, only a handful aside from the US were meeting the commitment, and after his threat, a few more stepped up and met theirs. This after 50 years of “pretty please” had fallen on deaf freeloading ears.

Now, with renewed pressure from likely Republican Presidential candidate Trump, more are meeting their commitment. According to Stoltenberg, 18 of the 31 members are “on track” to meet their commitment (meaning they still haven’t, but now are saying the right words in their respective legislatures).

That leaves 13 members who are shirking their duty. That leaves 13 members who are betraying their fellow members by rendering themselves incapable of meeting their Article V commitment to those members in any concrete way. That leaves 13 members who are imposing risks on their fellow members by rendering themselves so plainly incapable of resisting an attack on themselves that they tacitly invite one, requiring their fellow members to spend their blood and their treasure to rescue them.

That leaves 13 members who are the ones risking destabilizing the NATO alliance.