They know that it's audience depends on them to think. If they get called on it, then that person is a closet liberal, and they move on to the next set of propaganda. It's so routine that it is starting to get boring.
I am surprised he didn't grow a long beard and throw a rag on his head before doing this speech. If he would of looked like Osama, he would of had more of an effect on the Muslim world with his reading of the teleprompters, ahh I mean speech.