Skimmer is a partisan only until it impacts his wallet.
The main purpose of "the DU" is to maximize Skimmer's annual net DUmmybucks.
The overwhelming majority of active DUmpmonkeys are Berniebots, so the majority of 2017 Valentine hearts will be purchased with Berniebot DUmmybucks.
It's foolish to think Skimmer will drop the banhammer in any significant way on the Berniebots.
A symbolic handful of loudmouths maybe, but no more.
DUmmybucks will trump ideology every time.