Scott McLellan resigns

From ABC News/AP:

White House press secretary Scott McClellan said Wednesday he is resigning, continuing a shakeup in President Bush's administration that has already yielded a new chief of staff and could lead to a change in the Cabinet.

Does this mean he's headed back to Texas to work on his mom's campaign?
Also, from NPR:

White House Deputy Chief of Staff Karl Rove is giving up his policy portfolio and press secretary Scott McClellan is resigning, continuing a shakeup in President Bush's administration that has already yielded a new chief of staff.
A senior administration official, who spoke on condition of anonymity because the president had not yet made the announcement, said Wednesday that Rove is giving up oversight of policy development to focus more on politics with the approach of the fall midterm elections.