Tribalism is pretty corrosive, Democrats trashtalking the women who accused Bil Clinton of being a sexual predator is a particularly repulsive example.
However in return for selling out their principles, Clinton in exchange seemed to make voters happy with his policy decisions - at least to date Trump doesn't seem to be providing much for his voters beyond chaos and bile.
He hasn't, but his crazy makes the GOP legislature's ideas seem more reasonable by comparison to the moderate and that is worrying. That crap will get passed and become law. Many more reasonable conservatives made a deal with the devil to get their agenda into law.