WASHINGTON (AP) — Striking a deal with moderates, House Democratic leaders muscled President Joe Biden’s multitrillion-dollar budget blueprint over a key hurdle Tuesday, ending a risky standoff and putting the party’s domestic infrastructure agenda back on track.

The 220-212 vote was a first step toward drafting Biden’s $3.5 billion rebuilding plan this fall, and the narrow outcome, in the face of stiff Republican opposition, showed the power a few voices have to alter the debate and signaled the challenges ahead still threatening to upend the president’s agenda.

After a turbulent 24 hours that brought House proceedings to a standstill, Speaker Nancy Pelosi told her colleagues before the vote that the legislation would lead to a federal investment on par with the New Deal and the Great Society.

Pelosi brushed aside the delays. “That’s just part of the legislative process,” she said, according to an aide granted anonymity to discuss a closed-door caucus meeting.

Tensions had flared as a band of moderate lawmakers threatened to withhold their votes for the $3.5 trillion plan. They were demanding the House first approve a nearly $1 trillion bipartisan package of other public works projects that’s already passed the Senate.

In brokering the compromise, Pelosi committed to voting on the bipartisan package no later than Sept. 27, an attempt to assure lawmakers it won’t be left on the sidelines. It’s also in keeping with with Pelosi’s insistence that the two bills move together as a more complete collection of Biden’s priorities. Pelosi has set a goal of passing both by Oct. 1.

Easing off the stalemate will shelve, for now, the stark divisions between moderate and progressive lawmakers who make up the Democrats’ so-slim House majority. But as the drama spilled out during what was supposed to be a quick session as lawmakers returned to work for a few days in August, it showcased the party differences that threaten to upend Biden’s ambitious rebuilding agenda.

With Republicans fully opposed to the president’s big plans and arguing that Congress should be focused instead on the crisis in Afghanistan, the Democratic leaders have just a few votes to spare. That gives any band of lawmakers leverage that can be used to make or break a deal, as they are in position to do in the weeks to come as moderates and progressives draft and vote on the broader $3.5 trillion package.

“I think it’s important to those of us who are moderate Democrats to make sure that our voices are heard,” said Rep. Jim Costa, D-Calif., one of the negotiators.

Challenging their party’s most powerful leaders, nine moderate Democrats signed onto a letter late last week raising their objections to pushing ahead with Biden’s broader infrastructure proposal without first considering the smaller public works plan that has already passed the Senate.