Late-breaking polls of Super Tuesday states show 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 making big gains following his decisive victory in South Carolina and a flood of endorsements from former rivals eager to stop 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.).

The final FiveThirtyEight forecast finds Sanders and Biden each likely to win seven states a piece today, although the big question is whether Sanders can run up the score in California.

In California, the biggest delegate prize, a new Data for Progress poll found Sanders at 32 percent and Biden at 27 percent, while polls from Swayable and AtlasIntel found Sanders with an 8-point lead.

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This is a big change from just last week.

Most polls conducted in late February had found Sanders ahead by between 17 points and 21 points in California, suggesting that Biden is closing in fast. In the FiveThirtyEight model, Biden has gained about 7 points this week.

California will hand out 415 delegates, and a big Sanders win in the Golden State could give him a sizable delegate lead exiting Super Tuesday.

Biden still needs to turn the enthusiasm around his thunderous South Carolina victory into real support on the ground, where he's outmanned when it comes to staff and organization.

But the new polls suggest Biden has had a monumental 72 hours since winning the South Carolina primary, something a number of political observers are commenting upon.

David Axelrod David AxelrodThe Memo: Warning signs flash for Trump on debates GOP hunts for leverage in revived COVID-19 talks Pelosi says there shouldn't be any debates between Biden and Trump MORE, the former political strategist to former President Obama, said the polls portended a sizable bounce from South Carolina to Biden.

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The polls suggest Biden is closing in on Sanders in Texas, the second biggest state to vote.

Sanders has led in every poll of Texas since January, with one NBC News poll from last week finding him up by 15. But a Swayable survey released Tuesday finds Sanders’s lead down to 1 point, while Data for Progress finds Biden ahead by 2 points. The FiveThirtyEight model now counts Biden as the favorite to win the most delegates in Texas.

Early voting has been going on for weeks in California and Texas, which could be to Sanders’s advantage since he had led comfortably in both states.

Perhaps the biggest shift in Biden’s favor is taking place in Virginia, where polls were close only days ago.

The Data for Progress survey finds Biden opening up a 15-point lead in Old Dominion, after Sanders led in the same poll by 9 points one week ago. A Change Research survey released Tuesday found Biden ahead by 20 points.

The former vice president has locked down a slew of endorsements in Virginia in recent days, from Reps. Bobby Scott Robert (Bobby) Cortez ScottHouse passes bill to allow private lawsuits against public schools for discriminatory practices Pelosi: House will stay in session until agreement is reached on coronavirus relief This week: House returns for pre-election sprint MORE (D-Va.), Jennifer Wexton Jennifer Lynn WextonThe Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy Trump campaign knocks Biden event: 'All they could manage is a virtual event' Republicans face worsening outlook in battle for House MORE (D-Va.), Don Beyer (D-Va.) and former Gov. Terry McAuliffe (D).

In North Carolina, Data for Progress found the vote swinging from a 2-point advantage for Sanders to a 9-point advantage for Biden.

The same poll found Biden looking like a lock to sweep four other Southern states. Biden leads by 25 points in Alabama, 13 points in Arkansas and 7 points in Oklahoma and Tennessee.

In Minnesota, where Biden has not been competitive at all in the polls, he has charged all the way back in the Data for Progress survey, where Sanders has only a narrow 32 to 27 percent lead. That’s the first poll of Minnesota since 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.) dropped out of the primary race and threw her support behind Biden.

And the poll found Sanders leading Biden 29 to 23 percent in Utah, where the Vermont senator has been expected to win big.

Sanders does maintain big leads in Colorado, Vermont and Maine in the latest polls.

And it’s still possible that Sanders will come out of Super Tuesday with a delegate lead, in large part due to the weeks of campaigning and organizing he’s been doing in Texas and California this month.

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The progressive Independent has a massive volunteer network, and he’s been turning out tens of thousands of people at rallies, where supporters have gone directly to county registrars to drop off their mail-in ballots.

Biden is hoping centrists will rally around his campaign and that 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’s support will collapse. If it does, and those voters go to Biden, it will set up he former vice president for a strong result.

Klobuchar and 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 surprisingly dropped out of the race and joined Biden on the campaign trail to endorse him for president at the beginning of the week, giving him another boost of momentum.

The Biden campaign has released a torrent of endorsements from party leaders, including former Senate Majority Leader Harry Reid Harry Mason ReidSenate Republicans signal openness to working with Biden Mellman: The likely voter sham Bottom line MORE (D-Nev.) and former Sen. Barbara Boxer Barbara Levy BoxerThe Hill's Morning Report - Presented by Facebook - Biden, Harris launch Trump offensive in first joint appearance Bottom line Polls show big bounce to Biden ahead of Super Tuesday MORE (D-Calif.).