> Do the couple thousand people who moved from SF to Oregon or Seattle really really have the voting numbers to sway politics that much?

It depends on how close the numbers were beforehand, right?

> Disenfranchising transplants does not stop the idea.

If they retain the franchise in their former states, then they're not disenfranchised.

I'm frankly astounded that so many people have reacted so negatively to this idea. TO me, it seems like common sense: the mere fact of moving somewhere doesn't make one a local. We require immigrants to our country to learn about American history & civics: why not immigrants to our states?