MWO explores further what I wondered about in my post below below about the Times looking into a sinister liberal advocacy group. While not necessarily a thorough exploration of the subject, MWO notes that the New York Times hasn't mentioned Richard Mellon Scaife or Grover Norquist in connection with his Club for Growth in the past year.
I honestly can't remember any similar recent Times investigation into front groups on the Right, though an alcohol-addled brain's recollection isn't necessarily any kind of proof. Unless you're Bernie Goldberg, that is.