So Sarah Palin is a racist and a sexist meanie.
Projected effect on the presidential race: zero.
(McCain making an incredibly nasty joke about Chelsea Clinton or laughing when a supporter refers to Hilary Clinton as "the bitch", hasn't seemed to hurt him. And Lynn Westmoreland [of "I can't name more than two of the 10 Commandments but I want to post them everywhere" fame] called Obama "uppity" on the record. So I'm not sanguine about any of this doing anything other than motivating the troglodyte Right.)