Radical election results are not a recent problem suddenly brought about by the internet. Hitler didn't rely on foreign meddling on the internet to get elected. This is not a new problem, and we (the US) would be wise to look at historical breakdowns of the democratic process to understand how they happened and take active actions to prevent it from happening again. (I'm somewhat pessimistic that we won't, and it'll happen again. I just hope it's not within my lifetime)