This has certainly been true in the past. But if people get angry enough, they start opening up to mindless obstructionism. Democrats right now feel how Fox News viewers have felt for the past 20 years. When you have someone stoking that blind, seething rage, you stop caring about rationality, which is why logical appeals about Trump's complete unpreparedness for the Presidency fell on deaf ears. Those people were filled with righteous anger. Now the anger is sliding over to people on the left. And when liberals get filled with that rage, they aren't going to give a damn whether or not Trump puts forward a reasonable policy; the rage will cloud their judgment as it has on the right for decades. Trump could come out with a proposal that ends all student debt and makes college free forever and a lot of liberals would oppose it just because "fuck Trump." Honestly, at this point, I think liberals are ready for their representatives to obstruct any GOP action on anything; the rage feels palpable.