by Taylor Marsh But when does a political ad go too far? Of course, this is the ad I'm talking about . The ad raising questions about John McCain's health. If McCain was a happier warrior, maybe this wouldn't even be an issue. But he's not, so it is. Much of it stems from the "grumpy old man factor," which was on display at the debate on Friday. When you trump crankiness with cancer, it raises the doubt quotient even higher. But when you think of a "President Sarah Palin," the importance of McCain's health tilts off the chart. One can only wonder what ads might have been run against F.D.R. As for John F. Kennedy, the drug list alone scrolling on the tv screen would have scared voters to death. As Robert Dallek reported in his amazing book, "An Unfinished Life," which was one of the sources for my one woman show "Weeping for J.F.K." (performed in L.A. in '05). What the public didn't know about Kennedy's health would fill medical journals. A portion from my show is below, research verified through Dallek's book, among dozens of other sources: He had his women, his doctors and all the drugs that kept him alive: • Anesthetic procaine, for his Addison's disease • Cytomel, for thyroid deficiency • Lomitil • Metamucil, now there's a commercial for you • Paregoric • Phenobarbitol • Trasentine, to control his colitic diarrhea • Testosterone, to increase his energy and boost his weight after bouts of colitis • Penicillin, for urinary tract ...