You’re a long way from high school civics, I know, but I’m sure you know how the US Congress works: one chamber apportions representation based on population (with the will of the people widely thwarted by gerrymandering) while the other gives each state equal representation.

The US population has been migrating to urban centers for years, which concentrates progressive votes in small geographic areas — and in fewer states. The way Congress works, though, means that the GOP could gain control of the Senate while representing a minority of the US population.

And it’s likely they will.