Assuming the polls are entirely in line with public opinion and not slanted one way or the other, 45% is still a significant portion of the country. And if we assume the same Trump supporters in 2016 are still Trump supporters, which is a safe assumption given his poll numbers haven't really moved much one way or the other, they represent a majority in 32 out of 50 states. The difference in the amount of people who voted for Clinton over Trump in California alone is greater than the difference in the popular vote between the two. This is why I say California isn't the dictatorship of America. I know i've quoted the Federalist papers before, but the Founders wanted the President to be decided by the majority, in the majority of states, rather than the plain majority. The reasons for this are many, the primary one being that different states have different interests, and one American subculture or state shouldn't profit at the expense of another one, and that a consensus among many different groups of people is better than one half of the country dominating the other. Agree or disagree, this is the philosophy the country was based on, and in my opinion it is a sound one that takes many different elements of a very complex question into account.