WASHINGTON — Two key Democratic senators are expected to meet Tuesday with President Joe Biden at the White House as the party works to narrow his $3.5 trillion legislative package and momentum builds to close the deal with centrist and progressive lawmakers.

Sens. Joe Manchin D-W.Va., and Sen. Kyrsten Sinema, D-Ariz., are linchpins for the final package — two centrist lawmakers who have balked at the price tag and are now under pressure to show Biden what amount they could live with.

Biden is expected to meet separately with Manchin and Sinema as he works to come up with a final number, according to a person familiar with the meetings and granted anonymity to discuss them.

“In the next day or so we hope to come to a place where we can all move forward on that,” House Speaker Nancy Pelosi told reporters Tuesday at the Capitol.

Dems Hope to Close Deal and Avoid Shutdown

Pelosi said she had yet to hear a new topline figure from Manchin or Sinema, but indicated that she expects talks to start moving swiftly toward a conclusion that would enable passage of Biden’s package as well as a companion $1 trillion public works bill.

“We have to see what comes of the negotiations that are going on — if they are worthy of the commitments we have made,” she said. “We will pass both bills.”

The behind-the-scenes talks come as Republican senators blocked a bill Monday to keep the government operating and allow federal borrowing. Democrats aiming to avert a shutdown pledged to try again — at the same time pressing ahead on Biden’s big plans to reshape government.

The efforts are not necessarily linked, but the fiscal yearend deadline to fund the government past Thursday is bumping up against the Democrats’ desire to make progress on Biden’s expansive $3.5 trillion social spending and climate legislation.

Biden Optimistic Deal Will Get Done

It’s all making for a tumultuous moment for Biden and his party, with consequences certain to shape his presidency and the lawmakers’ political futures.

“You know me, I’m a born optimist,” Biden told reporters Monday, as he rolled up his sleeve for a COVID-19 booster shot. “We’re gonna get it done.”

Monday’s 50-48 vote against taking up the bill fell well short of the 60 needed to proceed over a GOP filibuster. Democratic Majority Leader Chuck Schumer switched his vote to “no,” a procedural step to allow him to bring the measure back for consideration.

With days to go, Democrats said they will try again before Thursday’s deadline to pass a bill funding government operations past the Sept. 30 fiscal year end, stripping out the debate over the debt limit for another day, closer to a separate October deadline.

Treasury Secretary Urges Action as Deadline Approaches

Treasury Secretary Janet Yellen told Congress in a letter Tuesday that Oct. 18 is the end date — when the Treasury Department will likely exhaust all of its “extraordinary measures” being taken to avoid a default on the government’s obligations.

Yellen urged Congress to “protect the full faith and credit of the United States by acting as soon as possible” to either raise the debt limit or suspend it.

Meanwhile, the real action is unfolding behind the scenes over the $3.5 trillion measure, with Biden and his Democratic allies in Congress seeking a once-in-a-generation reworking of the nation’s balance sheets.

From free pre-kindergarten and child care subsidies for families with small children to dental care and hearing aids for seniors with Medicare, there’s a lot in the president’s proposal — all to be paid for with higher taxes on corporations and the wealthy.

With Republicans solidly opposed, Democrats are rushing to trim the total and win holdouts within their own party.

Momentum Building

As the overall price tag comes down, Pelosi said the House Democrats would not move ahead on a bill until it is acceptable to their colleagues in the Senate. “We’re not there yet,” she said.

Exiting the evening caucus meeting, Rep. Richard Neal, D-Mass., the chairman of the Way & Means Committee, said as momentum builds toward Thursday, he was expecting a new total amount: “Let’s pop the number.”

Building on a separate $1 trillion bipartisan public works package that’s already cleared the Senate and is heading for a House vote Thursday, Biden is seeking major spending for health care, education and efforts to tackle climate change. The total price tag, he contends, is actually “zero” — covered by the expected increase in tax revenue.

He is personally calling fellow Democrats in Congress in an effort to resolve differences and bring his sweeping domestic policy vision forward.

But Republicans say it’s real spending that can’t be afforded, and a reflection of the Democrats’ drive to insert government into people’s lives.

With All Republicans Opposed, Dems Need Every Vote

And so far, the bill is also too big for Manchin, Sinema and other key Democrats whose votes are needed in the face of the GOP opposition. Manchin has previously proposed spending of $1 trillion to $1.5 trillion.

Progressive lawmakers said they’ve already compromised enough with more centrist Democrats, but in one potential development, Rep. Pramila Jayapal, D-Wash., the chair of the Congressional Progressive Caucus, confirmed she and Sinema have been in talks.

Biden’s proposal is to be paid for by increasing the corporate tax rate, from 21% to 26.5% on businesses earning more than $5 million a year, and raising the top rate on individuals from 37% to 39.6% for those earning more than $400,000 a year, or $450,000 for couples.

While Democrats are largely in agreement on Biden’s vision — many ran their campaigns on the longstanding party priorities — stubborn disputes remain, including how to push toward cleaner energy or to lower prescription drug costs.

With all Republicans opposed, Democratic leaders can’t spare a single vote in the 50-50 Senate, relying on Vice President Kamala Harris to break a tie to pass the eventual package.

Senate Republicans Reject Bill Aiming to Suspend Debt Limit

All this comes as other deadlines swirl this week to pay for government operations and allow more borrowing or risk a devastating federal shutdown or debt default — though those dire scenarios appear unlikely.

The bill Senate Republicans rejected Monday night would have funded government operations temporarily, to early December, while also providing emergency funds for Hurricane Ida and other disaster relief and for Afghan refugees.

Republican leader Mitch McConnell rejected that approach because Democrats also included a provision to suspend the debt limit, which would allow continued borrowing to pay off the nation’s bills.

McConnell has said he wants to fund the government and prevent a devastating debt default, but wants to force Democrats to split the package in two and take the politically uncomfortable debt ceiling vote on their own.