No they are not, there are so few co-ops that nobody cares about them. No politician campaigns promising to destroy co-ops, not even Trump, because there is no reason to.
I doubt the demographics of coop participation are even partisan. Urban organic food coops probably skew left, but all those rural infrastructure coops, fuel/etc service for farmers, probably skew right. Attacking coops wouldn't win you votes with many people on either side.
