Democratic senators, filing in for their weekly caucus lunch yesterday, looked as if they'd seen a ghost. "I haven't read it," demurred Barack Obama (Ill.). "I just don't have enough information," protested Ben Nelson (Neb.). "I really can't right now," John Kerry (Mass.) said as he hurried past a knot of reporters -- an excuse that fell apart when Kerry was forced into an awkward wait as Capitol Police stopped an aide at the magnetometer. Hillary Rodham Clinton (N.Y.) brushed past the press pack, shaking her head and waving her hand over her shoulder. When an errant food cart blocked...