What's the risk of John McCain dying in the next four years?

Here is a U-tube video from The Reality-Based Community:



Are we really willing to run the risk of electing the 72-year-old cancer-survivor, John McCain, President with Sarah Palin as his stand-in if something happens to him? That's one chance in six that an extremist radical right-wing anti-abortionist with a resume that would fit on a postage stamp might be suddenly propelled into the Presidency? A woman whose main claim to fame is that she was Miss Congeniality in the Miss Alaska competition two decades ago?

The risk that electing McCain as President represents has sharply jumped since last Thursday.