Thread by @mcpli

A4: No, no, no, no. In a word: NO. The “Big Sort” does not explain pro-GOP maps. 1/ #fairmaps

We explain why here: brennancenter.org/blog/what-is-e… 2/ #fairmaps

Want more proof? Consider North Carolina. NC didn’t have biased maps until 2011. brennancenter.org/analysis/curio… 3/ #fairmaps

So what happened in North Carolina in 2011? Did Democrats suddenly move to the cities??? 4/ #fairmaps

Noooo. What happened in 2011 was that Republicans controlled the redistricting process for the first time in 100+ years. 5/ #fairmaps

What was the result? Badly biased maps for the first time in NC. 6/ #fairmaps

That’s, in fact, par for the course. The biggest predictor of extreme gerrymandering is . . . single party control. 7/ #fairmaps

The second is battleground status, as we explained in the Brennan Center’s Whitford brief: brennancenter.org/sites/default/… 8/ #fairmaps

That may seem counterintuitive, but it makes sense if you think about it. 9/ #fairmaps

Battleground states like WI or NC, in short, aren’t Nebraska. There’s a lot of pink & light blue across the states. 10/ #fairmaps

That means if you can artfully slice & dice and recombine voters, you can engineer a ‘bonus’ for your party. 11/ #fairmaps