How Trump transformed NATO’s extraordinary 48 hours

For 48 hours in Ankara, Turkey, it felt as though the world was moving on Donald Trump’s timetable.

Markets lurched. NATO allies braced for confrontation. Ukraine searched for reassurance. Iran threatened to upend the agenda. One moment, leaders were preparing for diplomatic crisis; the next, they were describing a “love-in” with the very president many had feared would leave the alliance more divided than ever.

I’ve covered hundreds of major international events over my 25 years at CNBC — G7, G8 and G20 summits, OPEC meetings, climate conferences and multiple trips to Ukraine. But I’ve never witnessed such dramatic reversals of fortune, affecting so many global players, compressed into just 48 hours.

The NATO Summit wasn’t simply another diplomatic gathering. It became a real-time demonstration of how quickly the geopolitical landscape can shift when President Trump is at the center of it.

While major summits involving the U.S. inevitably revolve around Washington, this one felt different. It revolved not just around one country, but also around one individual.

Think about everything that was in play. Iran. Russia’s war in Ukraine. Greenland. European security. Spain’s refusal to meet NATO’s military spending targets. President Volodymyr Zelenskyy‘s uncertain standing with Washington. Every major issue seemed to converge on one summit — and every one of them ultimately revolved around the U.S. president.

To recount, every European NATO member — plus Canada — was effectively on trial coming into this gathering. Trump and Defense Secretary Pete Hegseth had again been aggressively criticizing NATO for its lack of support over Iran and for failing to spend anywhere near enough money on its own security.

In addition, the president took aim at Denmark yet again over its refusal to hand over Greenland for the greater good — whose greater good being a mildly contentious point — and, of course, Spain was getting both barrels for being even worse than the other 30 NATO partners in its military spending.

Zelenskyy was in town, once again to drum up NATO support. And let’s be honest, he never really knows what kind of reception he’s going to get from the Leader of the Free World.

Then came the absolute bombshell from Mr. Trump that he was done with dealing with the Iranians, done with the MOU and the ceasefire. Markets went south and oil went north.

At that point, the summit appeared to be heading toward confrontation.

And yet, then the optics changed on a dime. The mood changed just like that and suddenly love was in the air.

Even before the big final Trump press conference, world leaders were telling me in quiet asides that the meeting with Trump had gone brilliantly, that he had been very happy, that he had listened — actually listened — to every leader in the big closed-door pow-wow and had left in a good mood.

Hang on, was this the same Donald Trump who had been berating partners only hours earlier?

Yes, apparently so.

I wasn’t so sure, but I…