After meeting with Republican senators at the White House, President Joe Biden appears poised to push forward with his $US1.9 trillion COVID-19 relief plan even if it fails to draw Republican support.
While the White House termed Biden's discussion on Monday with 10 Republicans who pitched a downsized relief effort as "productive", the Democratic president told the senators their plan did not go far enough.
Biden told the group "that he will not slow down work on this urgent crisis response and will not settle for a package that fails to meet the moment", White House spokeswoman Jen Psaki said.
The Republicans who attended the meeting are pushing a COVID-19 relief proposal about one-third the size of Biden's.
Earlier on Monday, top Democrats in the U.S. Senate and House of Representatives filed a joint $US1.9 trillion ($A2.5 trillion) budget measure, a step toward bypassing Republicans altogether on a new virus relief bill.
Senate Majority Leader Chuck Schumer announced the plan for the fiscal-year 2021 budget measure in the Senate and House, saying it would allow Congress to fast-track a coronavirus package for passage by both chambers.
The measure would allow Democrats to bypass a 60-vote threshold in the closely divided Senate and enact coronavirus legislation with a simple majority through a procedure called reconciliation.
It would mark the first time congressional Democrats used the maneuver to flex their legislative muscle since winning razor-thin control of the Senate in two runoff elections last month in Georgia.
The 100-seat Senate is divided 50-50, with Vice-President Kamala Harris holding the tie-breaking vote to give Democrats the majority.
Treasury Secretary Janet Yellen is expected to meet Senate Democrats on the relief measure on Tuesday, the department said.
Schumer spoke before the Oval Office meeting on Monday evening among Biden, Harris and the 10 Republican senators, who have proposed a $US618 billion relief package.
Susan Collins, one of the Republicans attending, said the discussion was "frank and useful" but yielded no breakthroughs. She said the sides would keep talking.
Biden affirmed to the group, however, that he was prepared to push through a comprehensive bill with a party-line vote, Psaki said.
COVID-19 has claimed more than 440,000 lives in the United States, the most of any country, and cost millions of Americans their jobs.