If it's not too late for John McCain to reconsider his choice of running mate, a good choice to replace Sarah Palin might be Walt Monegan, the man Palin fired from his job as Commisioner of Public Safety in Alaska.  This comment from Time Magazine's Thornburgh on the results of the legislative investigation into Monegan's firing pretty much sums it up:

Monegan consistently emerges as the adult in these conversations, while the Palin camp displays a childish impetuousness and sense of entitlement.

The McCain campaign desperately needs an adult voice right now, not to mention some adult supervision, and Monegan is someone who could provide it.

We can't be sure what qualities McCain was looking for when he picked Sarah Palin, but we can now be pretty sure that "good judgment" was not one of them.