CBS News' chief political consultant Marc Ambinder provides some more insight into the departure of Democratic veep vetter Jim Johnson from Barack Obama's campaign. From Ambinder: Sources close to the campaign say that Obama was "irate" at the news reports of the meeting Johnson and Eric Holder held with Democrats on Capitol Hill. Obama had expected all the meetings to be private, but he was especially perturbed when reports surfaced about specific names that Johnson and Holder had brought up with some of the members of Congress.
The meetings on Capitol Hill were conceived of by Johnson; it's not clear why he didn't take the time to meet these folks at their homes. In any event, Obama wasn't happy and his advisers weren't happy, and they made their feelings known to the vetter. Johnson offered to resign. It was accepted quickly.