One advantage of a big, media-focused convention is that so many shadowy campaign "insiders" seek the spotlight. In Denver, one of Sen. Barack Obama's closest advisers has been making the media rounds: Valerie Jarrett. Jarrett has been part of Obama's inner circle since his days as an Illinois state senator. She identifies herself as a Chicago businesswoman, but according to Obama campaign advisers, she is much more than that. She is Iranian-American, for one thing, and the Obama campaign has sought to keep her ties to Iran from press views, as it has also sought to keep her political background...