Ezra Klein crunches the numbers over at Vox and comes up with a chart that shows the more money you make, the more likely you are to vote.
That's it. That's the whole ball game right there. The poorest Americans don't vote. The wealthiest Americans do, at a more than 2 to 1 margin.
If Americans making less than $50,000 a year voted at the same rate that Americans making over $150,000 a year do, Republicans would be out of business.
But they don't, so right now a majority of states are controlled by the GOP completely, and they have partial control over another dozen and change.
Poor people don't vote. Hence, Voter ID laws. This was a problem before, in 2016 it could cost us everything.