The Trump administration wants Congress to pass a stripped-down coronavirus relief bill using leftover funds from an expired small-business loan program, as negotiations on a broader package hit resistance.
The proposal, which Democrats dismiss as inadequate, is the latest twist in on-again, off-again talks to secure more stimulus, as the economy struggles to recover from shutdowns that have thrown millions of Americans out of work.
In a letter to members of Congress, Treasury Secretary Steven Mnuchin and White House Chief of State Mark Meadows said on Sunday they would continue to talk to Senate Democratic leader Chuck Schumer and House of Representatives Speaker Nancy Pelosi to try to reach agreement.
But they said Congress should "immediately vote" on legislation to enable the use of the unused Paycheck Protection Program funds, which total around $US130 billion ($A180 billion).
"The all or nothing approach is an unacceptable response to the American people," they wrote.
Representative Nita Lowey, the Democratic chairwoman of the House Appropriations Committee, rejected the administration's offer on Sunday as "woefully inadequate".
"We can only reopen our economy and set the foundation for a strong recovery if we support state and local governments on the frontline of this crisis," she said.
White House spokesman Brian Morgenstern told reporters the unused funds would be used to reopen the Payroll Protection Program, which expired earlier this year, to "allow businesses to continue to use it to keep their employees employed."
President Donald Trump on Friday offered a $US1.8 trillion coronavirus relief package in talks with Pelosi after urging his team on Twitter to "go big" - moving closer to Pelosi's $US2.2 trillion proposal.
That came days after Trump abruptly called off negotiations until after the November 3 election in which he is seeking re-election.