There is no pronounced trend. In fact, this very article says so. The trend is for people to move from conservative rural areas to liberal urban areas. In fact,

There is no pronounced trend. In fact, this very article says so. The trend is for people to move from conservative rural areas to liberal urban areas. In fact, a deeper look at the data will actually prove the opposite. That Democratic controlled locations are thriving and people are moving to it. For example, within New York, NYC population is actually growing.