Because they live in NJ, generally a Democratic stronghold and particularly in the area he described.
There are many parts of the US where the local government is 100% controlled by Democrats, so they are in power in those areas.
Thunderfork's question stands: if they are biased towards power (democrats), how can they also be biased towards the left?
Thunderfork's question stands: if they are biased towards power (democrats), how can they also be biased towards the left?