Rauner/Baker/Hogan are all rich enough that they might want to consider seeking reelection as Indies and hoping they get Trump-backing Republican opponents to pull some union/populist vote away from the Dems.
FL-GOV 2018 matters a lot more than most realize because it is the difference between a 4/3 liberal majority or a 6/1 conservative majority on the FL Supreme Court for 2021. One of the current 5 liberal justices hits the mandatory retirement age under Scott, and 3 more reach that age in 2019. If they lose that court, a Republican trifecta will basically be able to ignore the Fair Districts Florida law. Of course, FL Dems can still try a CA-style commission referendum in 2020 as a Hail Mary.
Florida matters next year. Will Democrats be able to get in after 20 years of dynasty?