Senators have bickered over who was to blame for lurching the US towards an end-of-year "fiscal cliff", bemoaning the lack of a deal days before the deadline but bridging no differences in the debate.
With the collapse on Thursday of House of Representatives speaker John Boehner's plan to allow tax rates to rise on million-dollar-plus incomes, Senator Joe Lieberman said "it's the first time that I feel it's more likely we'll go over the cliff than not" - meaning higher taxes for most Americans and painful budget cuts would be set to go ahead.
"If we allow that to happen it will be the most colossal consequential act of congressional irresponsibility in a long time, maybe ever in American history because of the impact it'll have on almost every American," said Mr Lieberman, a Connecticut independent.
If President Barack Obama and Congress cannot reach a deal by December 31, the fiscal cliff looms. Some 536 billion dollars (£333 billion) in tax increases, touching nearly all Americans, would begin to take effect in January because various tax cuts and breaks expire at the end of the year. Also, about 110 billion dollars (£68 billion) in spending cuts divided equally between the military and most other government departments would be triggered automatically.
The fear is that the combination of tax increases and spending cuts would push the fragile US economy back into recession.
Wyoming senator Jon Barrasso, a member of the Republican leadership, predicted that the new year would come without an agreement and blamed the White House. "I believe the president is eager to go over the cliff for political purposes. He senses a victory at the bottom of the cliff," he said.
But Democrat Kent Conrad of North Dakota, chairman of the Senate Budget Committee, was incredulous at Mr Barrasso's assertion that "there is only one person that can provide the leadership" on such a matter vital to the nation's interests. "There are 535 of us that can provide leadership. There are 435 in the House, 100 in the Senate and there is the president, all of us have a responsibility here," he said. "And, you know what is happening? What is happening is the same old tired blame game. He said/she said. I think the American people are tired of it. What they want to hear is, 'What is the solution?'."
But no solution seemed any nearer, with Mr Obama and Congress on a short holiday break. Congress is expected to be back at work on Thursday and Mr Obama in the White House after a few days in Hawaii.
Mr Obama has already scaled back his ambitions for a sweeping budget bargain. Before leaving the capital on Friday, he called for a limited measure that extends George Bush-era tax cuts for most people and staves off government spending cuts.
The President also urged Congress to extend jobless benefits for the long-term unemployed that would otherwise be cut off for two million people at the end of the year.