defense lawyers say they now believe there is a White House insider or former official who has been helping the investigation for months. The lawyers say this is based on information grand jury witnesses heard about the actions of Karl Rove and Scooter Libby well before reporters Matt Cooper and Judy Miller testified White house officials leaked information about an administration critic. The lawyers supporting the White House also point to a sealed legal brief Fitzgerald submitted to the courts more than a year ago that prompted judges to refer to the gravity of the case. According to several news...