Democratic leaders backed away from aggressive plans to limit President Bush's war authority, the latest sign of divisions within their ranks over how to proceed.Senate Majority Leader Harry Reid (news, bio, voting record), D-Nev., said Monday he wanted to delay votes on a measure that would repeal the 2002 war authorization and narrow the mission in Iraq. Senior Democrats who drafted the proposal, including Sens. Joseph Biden (news, bio, voting record) of Delaware and Carl Levin (news, bio, voting record) of Michigan, had sought swift action on it as early as this week, when the Senate takes up a measure...