Earlier quoted context omitted.
Clinton is supported by about 50% of Democrats. Trump is supported by about 25% of Republicans. That doesn't add up to anywhere close to "most Americans."
Perhaps. But chances are that these two will become their parties' candidates and then most Americans _will_ have to choose between them. The US has so many smart, hard working people, we deserve better.
In any case, saying that a broken system forces us to choose the lesser of two evils is quite different from saying that most Americans support one of these two candidates.