Sarah Palin's spokeswoman on Friday denied the stream of accusations leaking out of John McCain's campaign about the Alaska governor's alleged incompetence, calling the charges "sickening." Meghan Stapleton was responding to several reports that have surfaced since Election Day about the tensions between McCain's running mate and his staff. Campaign officials apparently had doubts about her preparedness to run for vice president. Sources told FOX News, for instance, that Palin did not realize that Africa was a continent, not a country, and could not name the countries who had signed the North American Free Trade Agreement.