Just back from Iowa, and I've got a theory about why Hillary Clinton has been having a difficult time. It's because she is the issue. No politician wants to be the issue and have the debate swirl around them and their foibles. And Hillary is working overtime to make Barack Obama the issue with the whole change-requires-experience argument. But I don't see the pundits, bloggers, radio people and cable hosts sitting around debating Obama's qualifications. They're chattering about Hillary, as they have for 15 years. Even talking about her looks, thanks to Drudge. Clinton's team, as I reported yesterday, believes...