What An Interesting Idea.
Don't have much time, so I'll just give a brief précis and a little opinion-spurt.
As the Guardian notes:
[T]he actions of the US impact on our lives in overwhelming ways… And yet, though the US Declaration of Independence speaks of “a decent respect to the opinions of mankind”, you don't, of course, have a vote. You can't even donate money to the campaigns: foreign contributions are outlawed. And you're unlikely to have the chance to do any campaigning on the ground. All you can do is wait and watch: you're powerless.
Or are you?
Damnit. Why don't they give us this happen earlier?