A couple of points. A few years ago Ken had his own problems with a sexual harrassment charge that was very believable, and was, I believe, quietly settled. The second point, though, is that conservatives are taking hits. First it was Bill Bennett, then Arnold S, and now Rush. If you're a RAT, it's just accepted behavior (sex and drugs). But lately, it seems the RATS have no corner on either market. And if Rush was buying drugs illegally, then I see no difference between that and cocaine, etc, even if a doctor initially prescribed them.
I can accept his weaknesses, just as with gambling. But it clearly weakens conservatives' moral positions, especially with our acceptance of Arnold's history of sexual activities.