US lawmakers have blocked attempts to alter a $2.3 trillion ($3 trillion AUD) coronavirus aid and government spending package, rejecting President Donald Trump's demand for extensive changes and leaving benefits for millions of Americans at risk.
Democrats in the House of Representatives sought to increase direct payments to Americans included in the bill from $600 to $2000 ($800 to $2650 AUD) per person as part of a coronavirus economic relief initiative, acting on one of Mr Trump's requests.
Mr Trump's fellow Republicans, who oppose the higher amount, blocked that effort.
Republicans sought to change the amount of foreign aid included in the package, seeking to address another one of Mr Trump's complaints. Democrats blocked that request.
The flurry of activity on the House floor did nothing to break a standoff that threatens desperately needed assistance for millions of Americans and raises the prospect of a partial government shutdown at a time when officials are trying to distribute vaccines in a country where nearly 320,000 people have died from COVID-19.
Embittered by his loss to Democrat Joe Biden, Mr Trump in a surprise move on Tuesday pressed Congress to dramatically alter the coronavirus and government-spending package, which passed by wide, bipartisan margins on Monday.
A bipartisan group of Senate and House members on Thursday urged Mr Trump to back down and sign the legislation. The lawmakers were instrumental in getting negotiations moving forward a few weeks ago when they proposed $908 billion ($1.2 trillion AUD) in coronavirus aid, slightly above the level Congress finally settled upon.
"The legislation would bring desperately needed help to struggling families, unemployed workers, hard-hit small businesses, an overburdened health care system, stressed schools, and so many others," they wrote.
Eleven senators, including Democrat Joe Manchin of West Virginia and Republican Mitt Romney of Utah, signed the statement, along with two House members, the Republican and Democratic co-chairs of the "Problem Solvers Caucus".
West Virginia and Utah were among states that voted overwhelmingly for Mr Trump in the November election.
Mr Trump was playing golf in Florida on Thursday. The White House did not respond to a request for comment.
Mr Trump posted multiple tweets on Thursday, most of which related to his baseless claims that the presidential election was rigged, but none discussed the spending package.
The 5500-page bill took months to negotiate and the White House had said earlier that Mr Trump would sign it into law.
With the status quo unchanged, it was unclear whether Mr Trump would sign the package into law or hold out for further action.
If Mr Trump does not sign the package into law, unemployment benefits for about 14 million Americans will lapse starting on Saturday and the US government would be forced into a partial shutdown beginning on Tuesday.
New stimulus cheques, which could go out as soon as next week, would be delayed, as would payments to cash-strapped states that are administering the vaccine rollout.
A moratorium on tenant evictions would expire on 31 December, instead of being extended for another month. The standoff comes as the US economy is cooling in the face of the raging pandemic.
Congress could keep operations running by passing a fourth stopgap funding bill before midnight on Monday.
To successfully do that, lawmakers would need Mr Trump's cooperation at a time when he is consumed by his bid to remain in office beyond 20 January, when Mr Biden will be sworn in.
A stopgap bill would not include coronavirus aid, however.
Many Democrats say the $892 billion ($1.2 trillion AUD) coronavirus aid package is not big enough to address the pandemic, and they have welcomed Mr Trump's call for larger stimulus cheques.
