"Whack Job"?

This is simply unbelievable:

***In convo with Playbook, a top McCain adviser one-ups the priceless “diva” description, calling her “a whack job.”

It's absurd to think anybody in the McCain campaign would say such a thing--in context--to a site like Politico with one week left before the election. If true McCain should immediately concede and 1) admit his advisers are incompetent, or 2) he's incompetent. Gotta be something else going on. Or maybe this adviser did poorly on the "test".