I used to work with a very experienced campaign manager, who had a colorful term to describe the phenomenon of politicians or their surrogates actually believing the spin they put on things. This isn't about making a case for something you truly think would be good policy, despite the fact that most don't agree with you.
It's about taking a position that has limited support and believing that the majority must be with you simply because you've fallen in love with your own reasoning or, perhaps, because those in closest proximity are always telling you how right you are.More here.
He used to say, "let's be careful not to drink our own bath water."
I thought of this when I read Greg Sargent's post recently about Paul Ryan being in total denial about how unpopular his Medicare plan is.