Maher donated to the Obama campaign (PAC = campaign)... has Rush donated to the Romney or Santorum campaigns? If not- how is he connected?
Romney himself constantly hides behind the "I legally have no control of my Super PAC" line so applying Romney's own standard, Obama has no connection to or control over a PAC supporting him.
I wouldn't either "hides" behind the PAC's, but neither has control over these PAC's.
First of all, are you sure paying Limbaugh, at all? Second, are you sure that someone at Bain called over to Limbaugh and said, "Call Fluke a slut?"
Third, to follow up on your point, Romney certainly doesn't control Bain in 2012.