My feeling is that the 20% club is generally composed of people who aren't ignorant politically. I'd say that they more than likely read the news often, strongly identify as conservatives (probably find the term 'neocon' offensive since it implies that things weren't always this way), and have to rely on politics to create a sort of artificial pride for themselves to replace the lack of pride they have in family, culture, God, whatever.
What I'm saying is that they're current events people. Most of this country comprises people who care very little about current events. We all know it is very difficult generally for people to admit they're wrong. Most people never put too much of a stake in politics, they do whatever they think is right based on the sociopolitical climate of the time, and if they are wrong, they'll have no serious qualms about admitting it. They never put a lot of thought into it anyhow and are aware of this. The members of this 20% club care about politics, they follow the news, and in doing so, they create no landmarks for themselves and absorb these fleeting bits and pieces of information without really contextualizing them.
And yes, they are self-deceived.