At the RNC Wednesday night, Rudy Guiliani said that no one would ever ask questions about a male candidate’s ability to juggle work and family. He cried sexism. Lots of people are pointing out the sexism inherent in these questions about McCain’s VP choice. And they’re right. It’s unbalanced. It’s sexist. But it’s valid. When a mother of young children enters a presidential race for the first time, these questions cannot be avoided.