My impression of American politics is that two corporatist candidates are put up in order to foster the illusion democracy. This is very similar to dictatorships where two communist party/military junta candidates are put up, or a theocracy like Iran where two revolutionary Islamists are put up. None of these things are democracy in a practical sense. Sometimes a monkey is put up against a particulary unpleasant corporatist who the establishment favours.
I don't think the US electorate understands this consciously. Unconsciously however, they seem to be rebelling. They elected the monkey. The establishment doesn't seem to know what to do about that.