Anybody can talk about the President or Politics BUT the way they are doing it (e.g. the example cited above) is blatantly false, racist, disrespectful, and just plain ignorant.

When Kanye West called President Bush racist because of the lack of a federal response to Hurricane Katrina, everybody jumped on him and demanded he apologize (which he did).

In this case nobody is calling for this country singer to apologize or anything. That is a lack of consistency.