The Nation got the scoop:
A terse statement from campaign manager Maggie Williams says:
After the events of the last few days, Mark Penn has asked to give up his role as Chief Strategist of the Clinton Campaign; Mark, and Penn, Schoen and Berland Associates, Inc. will continue to provide polling and advice to the campaign. Geoff Garin and Howard Wolfson will coordinate the campaign's strategic message team going forward.
