Not an American, so you could probably not care less, but here is my 0.5 cents.

Obama, for all his eloquence, sense of humor, likeability etc., I don't feel like he was a great President in the full sense. Yes he did some significant things, but he also failed on many of his promises. All in all, I think I represent a sizeable chunk of international observers who are sympathetic to the US in general - Obama was a so-so President all in all.

The same, I believe, would be with either Clinton or Trump. Both are certifiable liars, and Clinton is a war hawk on top of that, so we know the relations with Russia, or China for that matter, won't get any better. You as a nation will weather the next 4 years, in the state of being semi-disgusted and semi-ashamed, just as you did with Bush.

With Trump, things will get more wild and interesting in an unhealthy way, unless he gets grounded and demonstrates the features of a statesman--which he won't as we know.

So, I feel if you really need to have a serious and deep discourse and discussion with the other super-nations, you really need to pull a trick by bringing someone like Bernie back, and do it real quick. Which, again, I feel like an almost impossible feat to pull off, given the state of your political system.