Democrats have almost reached an agreement on a social spending bill that is a pared-down version of US President Joe Biden's priorities and plan to vote on that and an infrastructure bill in the coming week, House Speaker Nancy Pelosi says.
"I think we're pretty much there now," Pelosi said in an interview with CNN as Biden met with fellow Democrats Senate Majority Leader Chuck Schumer and moderate Senator Joe Manchin, who has objected to parts of the legislation.
No top-line number for the spending bill was likely to emerge from Sunday's breakfast meeting at Biden's home in Delaware, given some of the complicated issues that need to be resolved, sources told Reuters.
Several hours after the meeting was made public, there was no word on what, if any, progress was made.
Democrats have struggled to agree on a framework of $US2 trillion ($A2.7 trillion) or less that will allow the House of Representatives to move forward next week on a $US1 trillion bipartisan infrastructure bill and set the stage for passage of Biden's larger "Build Back Better" package.
The divisions threatened to derail Biden's agenda on social spending and climate change and embarrass the US president as he prepares to attend the opening of a global climate summit in Glasgow that begins on October 31.
Schumer and Manchin are meeting to finalise some of the particulars.
"I'm optimistic that we can do that," Pelosi said.
Asked if votes on the two bills would be held in the coming week, Pelosi said, "That's the plan."
Disagreements over the scale of the larger package have held up Biden's domestic agenda, with progressive Democrats in the House refusing to vote for the infrastructure bill, which has already been passed by the Senate, until a deal is reached on social programs and climate change.
Moderate Democrats, most notably Manchin and Senator Kyrsten Sinema, had objected to the original $US3.5 trillion price tag and some provisions of the latter bill.
Republicans oppose the measure but 19 in the Senate voted in support of the infrastructure legislation.
The White House is seeking to get Manchin to support roughly $US2 trillion in spending, up from Manchin's $US1.5 trillion figure, according to two sources familiar with the discussions.
The White House and Democratic leaders need the money to help keep the party unified as they slim down the legislation and make painful cuts to party priorities, like Medicare expansion, paid family leave and free community college.
Sinema has opposed a hike in the corporate tax rate that had been a main source of funding for the bill but Pelosi said losing that would not stand in the way of raising the roughly $US2 trillion needed to pay for the programs.
Pelosi said lawmakers have an array of options to fund the spending bill even without the corporate tax rate hike including better tax enforcement, a so-called billionaires tax and international tax harmonisation.
Senators were writing that tax proposal on Sunday and would introduce it on Monday, Pelosi said.
Treasury Secretary Janet Yellen said on the CNN program she anticipated no problems in funding the bill.
"All in all, it should be relatively straightforward to raise the revenue necessary to pay for this bill," Yellen said.
The White House is also pressing Manchin to agree on a number of environmental measures after the senator, from coal-producing West Virginia, opposed a centrepiece of the plan that would reward utilities that invest in renewable fuels and penalise those that do not.
Democrats are considering a flurry of options including boosting production tax credits for nuclear power and enhancing credits for carbon sequestration projects, the sources said.
Pelosi said addressing climate change was a health issue, a jobs issue, a security issue and a values issue for Democrats.
"We will have something that will meet the president's goal," Pelosi said.
"I'm very confident about that, even though it will be different than what we originally proposed."
Australian Associated Press