Former Vice President Joe Biden Joe BidenThe Memo: Warning signs flash for Trump on debates Senate Republicans signal openness to working with Biden National postal mail handlers union endorses Biden MORE’s surprisingly strong showings on Super Tuesday have catapulted him into the lead in the race for delegates at the Democratic National Convention in July in Milwaukee, a lead that is likely to grow in the coming weeks as more states weigh in.

The race for the Democratic nomination now enters a new phase, one in which Biden and Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) will scramble to accumulate delegates in states scheduled to hold their primaries each week, hopscotching to shifting spotlights across the country — and one in which the prospects for a contested convention, seen as fait accompli as late as the weekend, have faded substantially.

With results still trickling in from California, Texas and other states, Biden had accumulated 566 pledged delegates, according to The Associated Press, or a little more than a quarter of the delegates he needs to secure the nomination.

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Sanders stood at 501 delegates, and Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE (D-Mass.) had won 61 delegates. Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) had won a single delegate from American Samoa.

Three other candidates who had dropped out — former New York City Mayor Michael Bloomberg Michael BloombergThe Hill's 12:30 Report - Presented by Facebook - Latest with the COVID-19 relief bill negotiations The Memo: 2020 is all about winning Florida The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support MORE, former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE and Sen. Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE (D-Minn.), all of whom have endorsed Biden — had won a combined 85 delegates before suspending their campaigns.

Sanders on Wednesday sought to cast the results as a virtual tie once California finishes its agonizingly slow vote counting process.

“My guess is that after California is thrown in the hopper, we may be up by a few, Biden may be up by a few, but I think we now go forward basically neck and neck,” Sanders told reporters at a press conference in Burlington, Vt.

The Biden campaign was more optimistic. Los Angeles Mayor Eric Garcetti, a co-chairman of Biden’s campaign, predicted the former vice president would hold a lead of about 50 delegates once the votes are tallied.

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“That Bloomberg is out bodes well for Biden's chances of getting to, if not a majority of pledged delegates, then a fairly significant plurality,” said Josh Putnam, a political scientist who studies delegate allocation rules.

The counts in California, which can take agonizing weeks to tally, are likely to narrow Sanders’s initial advantage. While Sanders led among the millions of California voters who decided on a candidate weeks or months ago, Biden performed better among those who made up their minds in the final days.

Among those voters — about 1 in 5, according to exit polls — Biden led Sanders 44 percent to 22 percent, suggesting his vote totals could grow as more ballots are cast.

Biden’s lead is more likely than not to grow in the coming weeks. A series of primaries next week are dominated by demographic groups that voted heavily for Biden in the Super Tuesday contests: In Mississippi, African Americans made up 7 in 10 voters who participated in the 2016 Democratic primary.

About 1 in 5 voters in both Missouri and Michigan are black. In those two states, white, college-educated voters make up another third or more of the Democratic electorate. Biden won those voters in most Super Tuesday states.

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And as in Super Tuesday states, voters over the age of 45 far outnumber the younger voters who favor Sanders by wide margins.

Sanders is likely to do better in Washington and North Dakota, both states he carried in 2016 where black voters play a smaller role in the Democratic electorate.

“Given the calendar ahead, Biden should be able to protect and expand on his delegate advantage and either hope to woo the remaining non-Sanders delegates to make the difference or wait on a second ballot and have the superdelegates and his coalition of pledged delegates put him over the top,” Putnam said. “Sanders's path is narrower and hinges on keeping Biden under” the 1,991 delegates necessary to win outright on the first ballot.

Similar tit-for-tat trade-offs loom in the weeks that will follow: Sanders’s strength with Hispanic voters will clash with Biden’s support among older voters and black voters in Illinois, Arizona and Florida, which hold primaries on March 17. Sanders’s attacks on Biden’s past support for trade deals such as NAFTA will test Biden among union workers in Ohio the same day.

While the prospects of a contested convention have waned, the chances of a drawn-out contest in which Biden and Sanders hammer each other for months remains.

About 37 percent of the pledged delegates up for grabs have been allocated so far. If Biden and Sanders split the delegates relatively evenly, one of them would likely reach a majority on June 2, the final day of the nominating contest when Montana, New Jersey, New Mexico, South Dakota and Washington, D.C., hold their primaries.

The only prospects for a foreshortened primary, Putnam said, is if Biden hammers home unexpectedly significant wins in the coming weeks — especially in Michigan, a state Sanders won in 2016.

“If Sanders is to turn it around in any meaningful way, then he has to start by holding Michigan next week,” Putnam said. “He cannot start losing states he won in 2016 with any great consistency, not without finding a way to add others he did not.”