In the current context, how else to explain liberals justifying Obama's policies WRT the financial sector, or Republicans vilifying his healthcare bill? Ask both groups of people about those policies 4 years ago, in the absence of names and faces, and you'd get very different answers. And don't even get me started on "I'm either ok with or stridently oppose deficit spending".
That's the opposite of caching, it's tribe-based fist-pumping.