From the Washington Post Mary Kate Johnson, McCain’s Finance Director, has resigned.

Johnson’s resignation was confirmed by two sources with intimate knowledge of the inner workings of McCain’s campaign. Johnson was a relatively new addition to the McCain team, brought in after McCain underperformed expectations in the first fundraising quarter. Johnson replaced longtime McCain finance consultant Carla Eudy.

With Johnson gone, the vast majority of McCain’s senior staff has left the campaign. Rick Davis has stepped in as campaign manager and a few other key figures remain involved — including former McCain chief of staff Mark Salter. But, the McCain campaign looks vastly different tonight that it did just twelve hours ago.