I don't think that could be done by Executive Order. There might be enough in Congress that would overturn if he tried, but it'd be close. It'd be a huge public issue.
Rush could go to satellite. I'd bet El Rushbo already has plans to do it. It'd be the single biggest thing to happen to satellite radio, that's fer sure.
I heard that the people he is putting in for the FCC (is that the name are already supporters of the Fairness Doctrine)