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.
Romney bases his case for the presidency on the success of Bain, who is paying Limbaugh to call Fluke a slut and say the provocative things he says.
This is before even comparing comedian to political pundit and the different standards that should apply.
