Groupthink. For those who don't want to think. They simply believe what they are told.
Political correctness is when the loudest mouth around the conference table gets to set the agenda, because everyone else doesn't think, or speak up to say what they think.
Neocons dominate the president because he doesn't think things through for himself. He talks of having "a bunch of smart people around me." PR and spin seem to dominate politicians, not any thoughtful process.