A vote was expected in the afternoon, Mr. McConnell said, after the Senate reconvenes at noon.
The compromise was a package whose sheer size and scope would have been unthinkable only a couple of weeks ago. Its cost amounts to several hundreds of billions of dollars more than the entire United States federal budget for a year, and administration officials said they hoped that its effect on a battered economy would be exponentially greater, as much as $4 trillion.
“This is not a moment of celebration, but one of necessity,” Mr. Schumer said as he took careful note of the changes his party had secured in the legislation. “To all Americans I say, ‘Help is on the way.’”
The resulting measure is an attempt to sustain the workers and businesses that are losing income as vast sections of the American economy are shutting down under quarantine orders and to help the economy rebound quickly once the pandemic abates.
It includes direct support for companies large and small that have lost all or most of their customers in recent weeks, and direct payments to low- and middle-income families. The package also includes measures meant to encourage companies to keep employees on their payrolls even if their businesses have shuttered temporarily — and it increases aid to workers who are laid off anyway or have had their hours and wages cut back.
“We have either, clear, explicit legislative text reflecting all parties or we know exactly where we’re going to land on legislative text as we continue to finish,” Mr. Ueland said.
The president, after lobbing insults at Democrats late Monday evening for their demands in the final stages of negotiations, called on lawmakers to approve the deal by the end of the day.
“Congress must approve the deal, without all of the nonsense, today,” Mr. Trump said on Twitter on Tuesday. “The longer it takes, the harder it will be to start up our economy. Our workers will be hurt!”