Palin's vs. Obama and McCain's Clothes
Because they are men. It's unfortuante that in 2008 such a barrage of sexism is hurled at Palin, shamefully only the second woman in history to be nominated for vice-president and amazingly it took a generation from Geraldine Ferraro for either party to do it again.
It's the same sexism that was directed at Hillary Clinton and amazingly, it's coming from Democrats.
However hopefully it won't be long before we have female candidates in a Presidential election who won't be treated as Palin and Clinton were.