Yask is right, the hand-wringing over Trump's posturing with respect to defence is overblown.  What's more, even if he were serious as opposed to having one of his now-infamous Twitter Tantrums, the change in policy would almost cetainly evaporate in 3 and a half years time.

He may be a little too blasé on the Paris accord, though.  Yes, the document is as toothless as an earthworm.  But it is important symbolically, at least.  If the world's largest emitter isn't willing to embrace at least the idea of global cooperation on the climate problem, I'd say that is worrisome.