America's system is rotten. Heck, every country's system is a bit rotten (though America's more deeply so than many Western countries). But collectively, they all move forwards given enough time. That's one of the good things about globalisation.
I do believe that the Democrats are a right-wing, capitalism-centred party (fairly closely akin to the Conservative party in the UK). However, I disagree that they're outright owned and run by corporations, as the Republican party is. The Democrats also don't harbour the crazy religious wing of the Republicans, and thus can fairly freely propel forward social change, if not economic change.
And this election, it will matter especially for the reason I stated above: the Democrats (the party with a fair bit of social freedom) will have control of ALL houses for at least 2 years (likely only 2 years, since voters are historically fickle). This is fairly rare in most political systems I know of. It happens, but because it means one party gets unchecked power until the next election, people don't tend to give it to a single party for very long.
So I strongly disagree. It does matter. I guess I am assuming that with control of both houses and the executive, the Dems can pull off some decent policy. Well, if they can do anything about greenhouse gas emissions in the US combined with a continued push for wind+solar adoption (even if it's just a ****ing measly 5% to start with, like Australia's), then that's change I can believe in. For the record: Obama pushed hard on building loads and loads of new solar power stations towards the end of his 1st term. So there is history to back up my hope.
That's really sweet and all, but right now Congress is infestated with thugs and old grumpy Vietnam "veterans" who don't understand the modern world paradigms anymore. Psychopatic misanthropist like Paul Ryan or even Mitt Romney who never interacted with ordinary people in his life (except from TV and briefing videos maybe) are being cherished for having a "hardliner" bigot-right wing agenda, and the numbers of their followers is quite a significant chunk of the US population. Now *this* is really what's worrying me, that they, the people and all the institutions and media allow these underachievers to even talk in such an arrogant way. Nobody keeps them in check, that certainly cannot be true democracy.
Whether Obama or Romney gets elected will not change much, the agenda is already set. It's up to the Americans to wake up and claim their rights and freedom back from this feudalistic ****.
And Europeans by the way don't just need to wake up, they need to get SHOCKED UP with a murderous defibrillator.