1/5 of the population of the United States of America would be able to determine who gets elected? Mind you, age wasn't accounted for in the numbers I posted, but the entire states' populations were, not just those their big cities. In both California and New York, a huge chunk of the population live in more rural areas, and those tend to vote more Republican.
New York and California aren't the exceptions, they ARE America, in terms of representing the various demographics.
The tumbleweed states that the Electoral College grants a disproportionate amount of their votes to are not just a tad more monochromatic, but their populations are aging as well, and both these are on the increase as their youth move out to other more economically sound states. So basically an aging less educated poorer 'White' population is having an ever-increasing sway in politics. Not just with presidential elections - the only place in the world that has such a voting system, btw - but with the Senate as well.