"The storm had been brewing well before I arrived in the West Wing, but now it was directly ahead. Trump was correct on the burden-sharing point, as Obama had been, a convergence of views that might have shaken Trump's confidence in his own had he paid attention to it. The problem, from the perspective of US credibility, steadfastness, and alliance management, was the vitriol with which Trump so often expressed his displeasure with allies' not achieving the objective, or in some cases not even seeming to be interested in trying. In fact, earlier Presidents had not succeeded in keeping the alliance up to the mark in burden-sharing in the post-Cold War era. I certainly believed that, under Clinton and Obama in particular, the US had not spent enough on its own behalf for defense, regardless of what any of the allies were doing or not doing. If any of this were merely a critique of Trump's style, which it seemed to be for many critics, it would be a triviality. Personally, I've never shied away from being direct, even with our closest friends internationally, and I can tell you they are never shy about telling us what they think, especially about America's deficiencies. In fact, it was not Trump's directness but the veiled hostility to the alliance itself that unnerved other NATO members and his own advisors."