There is no list anywhere of what is politically correct and what is not, and it's often just a demeaning way to say "has liberal views" with an implied smirk.
I was discussing Ann Coulter's recent remark about Jews with Dann, and he basically said that her views were already known, and that she was offered the opportunity to make the statement she did so that people who don't like her views would have a chance to feign "mock outrage".
That's clear and makes sense. If he had just said, "Oh they are mad because what she said wasn't politically correct", the meaning would not be clear at all.
Thinking and having convictions is difficult for many people anyway so it's helpful, if you want to sway opinions, to have phrases like "politically correct" that everyone can put their own meaning on.
I don't even care about the term that much. I would just like to point out that it's a tool to influence thinking and it has so many meanings to so many people that it really has no practical meaning at all. It's time for people to recognize that and retire that term, in my opinion.