Yesterday, Hillary Clinton's campaign manager, Patti Solis Doyle, stepped down. Doyle, long Hillary's right-hand woman, said she hadn't expected the primary to run on so long and wanted to get out of the race for personal reasons. She was replaced by Maggie Williams, a former aide to Bill Clinton when he was president and another longtime ally of Hillary's. Williams, according to the Daily News, is a tough fighter who has engaged in many legal battles on behalf of the Clintons. She's also been used by the couple in the past to boost their likability with African-Americans. The turnover came swiftly on the heels of four Obama wins over the weekend, in primaries in Maine, Washington state, Nebraska, and Louisiana. Obama now holds a small delegate lead. The appointment of Williams seems to indicate that Hillary is in fighting mode again, and we remember how that went last month. But according to The Wall Street Journal, it might not be the only big shift in her team and strategy. Harold Ickes, who has been a longtime Clinton helper, might also get an "expanded role."