Governor Sarah Palin, the woman John McCain picked for his vice-president, has five kids, including a teenage daughter and a newborn with Down's syndrome. Daily Kos (and some other liberal blogs, although that's the only one I've seen) theorized that it was a cover-up and that the newborn was actually the teenage daughter's secret baby. They have some anecdotes that sound questionable and a series of candid public photos taken of Governor Palin during her pregnancy that don't show her gaining any weight (or at least not making it very evident ).

Governor Palin then threw out the news that her teenage daughter is five months pregnant (and marrying the father). It makes it almost impossible for the daughter to have been the birth mother, unless you're really, REALLY pushing it. (But, if you love the conspiracy enough and believe they'll lie about anything up to and including the daughter's current state of pregnancy, it's possible. Barely, but still.)