Extensive Senate revisions would force lawmakers to work at a frantic pace to meet a self-imposed Feb. 13 deadline for completing a compromise bill with the House, which passed an $819 billion version last week. Obama reiterated his call for urgent action in a meeting Monday night with Democratic leaders and by letter yesterday to Senate Majority Leader Harry M. Reid (D-Nev.).

For now, the Senate bill remains a work in progress. “We’re trying to find a way to reach 60” votes, Majority Whip Richard J. Durbin (D-Ill.), the Senate’s chief vote counter, told reporters. “A number of Democrats have said they want to see changes to the bill before they can vote for it.”

Durbin predicted that “100 decisions” will be “made between now and when we deliver the bill to the president’s desk.”…

Among the items that the Collins-Nelson initiative is targeting: $1.1 billion for comparative medical research, $350 million for Agriculture Department computers, $75 million to discourage smoking, $20 million in Interior Department funding, $400 million for HIV screening and $650 million for wildlife management.