Because there are a lot of largely rural, low-population states, the average state — which reflects the composition of the Senate — has 35 percent of its population in rural areas and only 14 percent in urban core areas, even though the country as a whole — including dense, high-population states like New York, Texas and California — has about 25 percent of the population in each group. That’s a pretty serious skew. It means that the Senate, de facto, has two or three times as much rural representation as urban core representation … even though there are actually about an equal number of voters in each bucket nationwide.
And of course, this has all sorts of other downstream consequences. Since rural areas tend to be whiter, it means the Senate represents a whiter population, too. In the U.S. as a whole, 60 percent of the population is non-Hispanic white and 40 percent of the population is nonwhite. 1 But in the average state, 68 percent of people are white and 32 percent are nonwhite. It’s almost as if the Senate has turned the clock back by 20 years as far as the racial demographics of the country goes. (In 2000, around 69 percent of the U.S. population consisted of non-Hispanic whites.)
It also means that the median states — the ones that would be decisive in the event of a 50-50 tie in the Senate — are considerably redder than the country as a whole. In the next table, I’ve arranged the states from top to bottom based on how much more or less Republican they were than the national average in the presidential elections in 2016 and 2012.