Monica, let me give you the name of Steve Bullock, the re-elected Democratic Governor of Montana.  He is 50.  He won re-election against a conservative who spent nearly $6 million of his own money (yes you read correctly).  Montana is a state that Trump won by 20% points.

If Montana wasn't such a small state (population, not area) he would be a good individual to consider as a candidate in 2020 for president.  He has demonstrated the ability work across the aisle to get things done.  The Montana legislature is heavily Republican.

Also, in his favor as possible DNC Chair is that Montana Legislature meets every other year.