Only 2 states have proportional EC votes (Maine and Nebraska). So we’d have to get Democratic candidates winning the statewide vote.

A lot of the people moving to red states from blue are actually conservatives who want to live somewhere with Republican governments. In 2018 Beto won with native Texans but Republican-voting transplants tipped it for Cruz. I think we already have the overall population demographics to flip, if we could just get enough people to actually come out and vote.