There's that and the fact that our federal representation being so heavily based on the arbitrary geographic divisions that are states is in practice a giant gerrymander in favor of rural voters. Some rural citizens of low population states (say, in Wyoming) have Senate votes that carry 100 times the weight of the Senate vote of a citizen of a large state like New York, California, or Texas. Their Congressional vote may have nearly triple the weight of that of a city dweller simply because of minimum district sizes in states with more than one district, and their Presidential vote 8x because the 2 extra electoral votes corresponding to the senate seats are diluted among fewer congressional districts.

As long as we have this system, our democracy and the ideal of "one person, one vote" is a joke.