Stephanie Cutter, the controversial John Kerry for President mouth who was eviscerated by Newsweek and who was blamed for some of the campaign's worst blunders, reportedly is negotiating a return to Ted Kennedy's Senate staff. Sources say Cutter's second stint in Kennedy's communications office is a done deal, a development that has seasoned politicos shaking their heads. ``It's a mystery,'' said one Senate snitch. ``It's very puzzling. People don't know how to digest it.'' But the senior senator is apparently a big fan of the thirtysomething blonde. ``Stephanie is one of the best in the business and would be a...