...and I wouldn't want to pile on here, but she's really not helping her case.

From Reuters (emphasis mine):

A Fox News report cited unidentified campaign sources who said Palin did not know Africa was a continent and could not name the three countries in NAFTA -- the United States, Canada and Mexico.

"I think if there are allegations based on questions or comments that I made in debate prep about NAFTA or about the continent versus the country when we talk about Africa there, then those were taken out of context, and that is cruel and mean-spirited, it's immature, it's unprofessional, and those guys are jerks," Palin said.

It's not fair and it's not right," she said.

I didn't know Africa was a continent AND a country...