Amen.
While I'm inclined to believe that an adversarial Congress is beneficial to the nation on the whole, the zeal with which most Americans seek to categorize themselves into "in-group" and "out-group" members is discomforting.
Scarier though, in my opinion, is how quickly the politicians are to capitalize on that polarization, which offers instant and immediate demonification of whomever takes the opposite view; and so long as the parties work like this, nobody notices that so much of the parties' political platforms are not internally consistent, or are even highly hypocritical.
Having been swayed by good arguments enough that I felt the need to make sense of it, I was able to divine a set of 'first principles' that I endorse, and policy choices that align with those principles tend to be ones that I approve of, no matter who, or from which party it originates.
Of course, being a political chimera makes for often difficult discussions.