Who runs the Republican Party from Fox News?

Rush Limbaugh has been credited with running the Republican party from Fox News, because he wields so much power with the far-right voting public that the Republicans have been afraid to stand up to him or risk being the target of his vitriol.

The viewing public has an unfortunate tendency to believe Limbaugh's twisted rants, although his views are only protected under the First Amendment as long as he acknowledges he's providing entertainment and not claiming to speak the truth. Limbaugh admits this when challenged.