I was going to stay out of this thread ( so I may regret writing this comment upon reflection) but I think you miss how important the US is to the world, both in terms of its economic might, its military might, including treaty obligations, and its role as symbol for freedom and liberty but also its role as arbiter of disputes. The US is the great power remaining. It may not be that way forever.

Of course, the world follows US politics. If the US withdraws from the world, violates its treaties, introduces a police state to jail and deport people I'd say it presages a new political reality for the world. Whether the divisions in the US are evidence of a gathering storm we shall see. But US foreign and domestic policies certainly have consequences for the world and the world understands this. The US is the biggest market in the world. The US is the single most important actor on the world stage.

Alan