Amid a chaotic period on Capitol Hill filled with major disagreements between factions of the Democratic party over the key provisions of President Joe Biden's domestic agenda, top Democrats in Washington are forging ahead with their plans to push two key provisions forward.

A vote is set Thursday on the $1 trillion bipartisan infrastructure bill, which passed the Senate in August by a wide margin, 69-30. The bill would provide funding for roads, bridges, clean water, broadband and other public works projects.

Both House Speaker Nancy Pelosi and the White House spokeswoman, Jen Psaki, said they expected a "winning" vote Thursday night, despite uncertainty it has enough votes from Republicans and progressive Democrats to pass.

"We're working towards winning a vote tonight," Psaki said.

Speaker Pelosi seemed intent on moving ahead with the scheduled infrastructure vote earlier Thursday morning, telling reporters, "We’re on a path to win the vote."

"I don't want to even consider any options other than that," she continued, adding: "We go in it to win it."

The date for the vote was set as a compromise to assuage the wishes of moderate Democrats in the House, but progressives in the caucus may block the bill because the House has not yet considered a much larger $3.5 trillion budget proposal, which would fund social safety net programs including paid family leave, free community college and universal pre-kindergarten and an expansion to Medicare to include dental and vision coverage.

But the details of the larger proposal are still being worked out, and it is not ready for a vote.

"The way the president sees it is that this is an ongoing discussion and ongoing negotiation," Psaki said Thursday.

The showdown in Congress and continued negotiations between moderates and progressives has put the two key pieces of President Biden's domestic agenda in a "precarious" position, as White House press secretary Jen Psaki put it Wednesday.

For the infrastructure vote scheduled for late Thursday, Democrats need every vote possible to get it passed due to their razor-thin majority in the House. Progressives are likely to vote against it, and only a few Republicans have said they will support it.

But Speaker Pelosi on Thursday doubled down, saying "this is the fun part."

"Let me just tell you about negotiating," Pelosi said to reporters at her press conference. "At the end, that’s when you really have to weigh in. You cannot tire. You cannot concede. This is the fun part.”

Pelosi met with members of her leadership team early Thursday ahead of a high-profile day on Capitol Hill, including a vote in both chambers to keep the government funded through December, averting a shutdown.

House Majority Leader Steny Hoyer, D-Md., on the other hand, expressed pessimism when asked if he is confident the bipartisan infrastructure bill will pass if it hits the floor Thursday, simply replying: "Nope."

In recent days, the White House has held multiple meetings with key centrist Sens. Joe Manchin, D-W.Va, and Kyrsten Sinema, D-Ariz., to try and hash out an agreement on the larger reconciliation bill as progressives and moderates continued to clash.

Moderates have expressed concerns about the price tag of the reconciliation bill, while progressives, who wanted to go even further in terms of overall cost, pledged they would withhold their votes on the bipartisan bill if both are not passed in tandem.

Politico reported Thursday that Manchin proposed a top-line figure of $1.5 trillion to Senate Majority Leader Chuck Schumer, D-N.Y., over the summer. The outlet obtained a copy of a document from July, signed by both lawmakers, which outlines the top-line figure, as well as other provisions, including raising the corporate tax rate.

Manchin told reporters at the Capitol Thursday that he has communicated the $1.5 trillion figure to the White House and Sen. Sinema, adding that if liberal Democrats want a larger bill, "they should elect more liberals." 

"He would like to have a lot more than that," Manchin said of telling President Biden the $1.5 trillion figure, but added that the president has been "respectful" toward the West Virginia lawmaker's convictions.

The White House press secretary on Thursday responded with the president's perspective: "He's been through this before, so he's not too thrown off this game."

"We've seen a lot of members out there advocating for their viewpoints, being very vocal about what they want to see. Some coming up, some coming down," Psaki added. "That's a sense of progress, and we're working on it hour by hour here."

The majority leader's office also clarified his position on the $1.5 trillion agreement: “Leader Schumer never agreed to any of the conditions Sen. Manchin laid out; he merely acknowledged where Sen. Manchin was on the subject at the time," a spokesperson for Schumer said in a statement. "Sen. Manchin did not rule out voting for a reconciliation bill that exceeded the ideas he outlined, and Leader Schumer made clear that he would work to convince Sen. Manchin to support a final reconciliation bill — as he has doing been for weeks.”

In a separate statement, a spokesperson for Sen. Sinema said that the Arizona lawmaker attempted to dispel claims that she had not shared her views with Biden and Schumer, saying that in August, she shared "detailed concerns and priorities, including dollar figures, directly with Senate Majority Leader Schumer and the White House." 

Per the statement, Sinema "continues to engage directly in good-faith discussions with both President Biden and Senator Schumer to find common ground."

Earlier Thursday, Sinema expressed that her conversations with the White House have been "productive" and noted that the two sides are "making progress."

At her presser earlier Thursday, Pelosi expressed confidence that negotiations are moving in the right direction: "I think we’re in a good place right now. we’re making progress. I can’t stay here too long because I have to deal step by step with things."

The California Democrat sought to assure people that there will most assuredly be a reconciliation bill in addition to the smaller bipartisan bill.

"Remove all doubt in anyone's mind that we won’t have a reconciliation," Pelosi said. "We will have a reconciliation bill. That’s for sure."

Pelosi called the reconciliation bill a "culmination" of her service in Congress, "cause it was about the children, the children, the children, the children" – citing benefits to childrens' health, education, "the economic security of their families" and environmental programs to combat climate change.

But, she added, Thursday is about "proceeding in a very positive way to bring up the bill, the BIF, to do so in a way that can win," saying that things are moving in the right direction: "So far so good for today."

Centrist lawmakers emerged from a meeting with Pelosi after the press conference Thursday with continued confidence that the vote on the infrastructure bill will take place that day. New Jersey Rep. Josh Gottheimer, a leader of the House moderates, told reporters after the meeting that the vote is "happening today, we're moving forward."

Moderate Rep. Henry Cuellar of Texas said that Manchin has given his top-line figure and is working toward finding a "comfort level" with progressives.

Progressive House Democrats also held a meeting with Pelosi later Thursday, with Rep. Pramila Jayapal, D-Wash., chair of the Congressional Progressive Caucus, calling the meeting "a great conversation" but noting that "we're in the same place."

"We will not be able to vote for the infrastructure bill until the reconcilation bill has passed," Rep. Jayapal told reporters, but added that "all kinds of things can happen very quickly" when asked about the possibility of a vote on the bipartisan bill Thursday.

"We're going to stay here all weekend if we need to to see if we can get a deal," Jayapal said, but noted that Manchin's proposed $1.5 trillion figure is "not ultimately what's going to be the package."

"We are able to do whatever we can to deliver the entirety of the president's agenda," she told reporters.