Do you have any evidence for this claim?
1. https://mississippitoday.org/2016/07/13/mississippi-brain-dr...
2. https://www.omaha.com/news/education/higher-education/nebras...
College-educated workers want and need to live in more urban areas that have employers in future-forward industries. From a cultural aspect, I think these people also want to live in municipalities (up to state government) that are run by people that share their values. Among the educated, these values are increasingly progressive.