Did Gonzalez and Ashcroft Conspire to Obstruct Justice?

In short, after Attorney General John Ashcroft delayed mounting any investigation into the Plame leak, he then delayed informing the White House of the investigation (in order to trigger their duty to preserve documents). Once Ashcroft did notify the White House, White House Counsel Alberto Gonzalez asked if he could wait until the next day to send out the official notice to White House staff to preserve documents relevant to the investigation. Even though the request was extraordinary, and outside any normal prosecutorial procedures, Ashcroft obliged.