WASHINGTON - At a time when even President George W. Bush acknowledges the war in Iraq is sapping the nation's spirit, the Senate has tied itself up in procedural knots rather than engage in a debate on Iraq policy. Given the influence that voter frustration with Iraq had on the November elections, the national unease with the mounting human and financial costs, and the raw passion on all sides, even some lawmakers say they are astounded that the buildup to the Senate fight over Bush's proposed troop increase has produced such a letdown. "It just floors me," said Sen. Amy...