We're sad for you as friends, gleeful as competitors.
This business of States (not people) electing the President has always struck us as dodgy. On top of your system basically a replacing the concept of "King" with "President", where the ENTIRE executive branch of government hinges on a single person, then that decision has rested, over and over again, on the vagaries of a half-dozen of your States representing 1/6th of your population.
What this election has absolutely done is clarify to everybody is that the American constitution that you so revere, is something no democratizing country writing one would touch with a 3-metre pole. (Only you use "feet", like only you think your Constitution is a good idea.)
The American constitution is like the Cathedral model: whomever gets into the papacy designs the cathedral. Parliamentary systems are more open-source, like Raymond's Bazaar model: you need a continuous sense of consensus to keep going forward. If Mr. Trudeau started ranting about Area 51 conspiracies tomorrow, his best friends would push him into resignation by the end of the week, after presenting him with the list of MPs who wanted him to know he's lost their support. It's just stabler system, as things have turned out.
Your Presidential "King" thing is a single-point-of-failure; affect that outcome, and you've hacked the country. And Palin showed nine years ago that utter incompetents with a string of applause lines can get past the outer filters. So it was a natural and obvious line of attack.
The US ship of state is very large, the bureaucracy gargantuan, the economy has enormous momentum; it'll "survive", obviously - but thriving is a whole other question. All Putin could hope for was to limit American advancement and growth to some extent. He's likely to get it, as good government rarely comes from radical voices, even popular ones.
Best of luck with it. Like all radical mutations, there's a chance it'll turn out really well; bold experiments sometimes do. But of course, most mutations turn out badly.