One of the flies in the R Governor vs. D Governor, Open vs. Closed states, Southern vs. Northern states narrative-ointments is California. California is all of the things that should be bringing on a surge, but California's new cases numbers have been flat for 5 or 6 weeks.
None of the simplistic answers work, IMO, because there are multiple contributing factors that may vary when comparing one state to another (e.g., while CA has been very shut down compared to FL, CA has been more open than has MI).