Is There a Polling Error That Favors the Republicans?

Andrew has done exhaustive research on all the key midterm elections to deliver to you a definitive guide on what to look for on election night. How soon will we know if things are good? Or if they are terrible? Which election outcomes should we be surprised about and which should be completely not surprising? Find out! Also, patrons gain access to Andrew's entier notes on this one, which you may want because there is a lot here!