Yes, winning governorships in Florida, Michigan, Pennsylvania, Wisconsin, and Ohio will not give Democrats control of redistricting in those states (the legislatures are way too gerrymandered), but it will give them a seat at the redistricting table where they can force fair congressional and legislative maps. I've long said that fair maps in those states would almost automatically result in Democrats picking up six House seats.
Funny enough, because Democrats completely swept the state Supreme Court races in 2015, they now have control of the legislative redistricting process due the way PA handles those maps. The commission is bipartisan, but the Supreme Court picks the tie breaker. It's not guaranteed for Democrats, but with a 5-2 majority, it's about as good a shot as they will get. Further, if Governor Wolf holds on, that gives them veto power over anything they don't like, including Congressional maps. It might even be enough to force Republicans to give in to redistricting reform before 2021.
On top of that, there is
another Republican-held state Supreme Court seat up in November, and the other one is up for a retention vote. Democrats could deepen their bench further to a 6-1 majority.
And if that wasn't good enough, there is a lawsuit being heard in PA state courts challenging the Congressional map I believe as a partisan gerrymander. It might be possible that the PA Supreme Court starts throwing out gerrymanders as a violation of their constitution. With such a big Democratic majority on the court, I'm feeling relatively good about that.
