While both campaigns were busy ramping up for the internet generation and Web 2.0ing the electorate .. they forgot to attend to security on their systems.
According to the Newsweek story, a federal agent told Obama campaign officials that they had an IT security problem "way bigger than what you understand. You have been compromised, and a serious amount of files have been loaded off your system."
Technical staffers working for Obama later speculated that the hackers might have been from China or Russia, the story says. It adds that a security firm retained by the campaign later plugged the security holes.