After all, the South was solidly Democratic 30-40 years ago as the end of the segregationist era. Today, it is solidly Republican. Who knows what will happen in the next 30 years?
In other words, most of the people moving to the red states from the blue should only help to strengthen the GOP hold on those states. But that also means that the blue states become more blue, which dooms them to further decline.
"Who knows what will happen in the next 30 years?"
Bump to that.