They believe the liberal base expects them to deliver and will punish them if they don't. Voters are increasingly worried about unemployment, but Democratic leaders in Congress remain obsessed with passing health- care reform. Senate Majority Whip Richard Durbin was asked recently if a health-care bill would pass the Senate by the end of this month. "It must," he said. "We have to finish it." Still, many in the trenches are uneasy about the sprawling, complex bill they privately acknowledge has no bipartisan support, doesn't seriously tackle soaring costs and will increase insurance premiums. That may explain Majority Leader Harry...