Jake Sullivan:

President Trump has basically shattered the American alliance system to the point where the question is not how much damage has been done. The question is: can these alliances actually survive beyond Trump?

Will a new president be able to walk into rooms with our NATO allies, with our Asian allies, with others and say, "Let’s work together?" Or is that new president going to get the cold shoulder?

That’s how degraded the situation is today, to great cost to the U.S.