"Serious but so far undisclosed ailments" - Eric Margolis says this is the word on John McCain from one of his old friends. The line about Palin being a heartbeat from the presidency - never very funny to begin with - is now dead serious. I was guessing something was up with McCain's health recently; since a little before the Convention, he's started to look like someone at death's door. Margolis discusses just how terrifying a Palin presidency would be.