I doubt that the impact is great, nor that it is something to get too worried about. I may have missed it, but it didn't seem to talk much about the most influencial thing that foreigners can do to affect US elections is to talk with Americans abroad and on those that share their views, encourage them to send in their ballots.
I'm not at all worried about some kind of Euros for Truth or something. Frankly, given most Americans' take on things, I would think the effect would be negative for whomever they purported support.
As I said though, if you are a foreigner concerned about the election, call some Americans and tell them why. That's really more effective than trying to infiltrate some money into a system flooded with cash.
|