The biggest primary day, about 1/3 of all delegates at stake and two victories already declared tonight.

Based on analysis of the exit poll.

ABC News Projecting that Joe Biden will win the all important state of Virginia and that Bernie Sanders will win the Vermont primary that was expected going into tonight.

Joe Biden going into today's voting with new momentum.

Amy Klobuchar, people to judge and Beto work all endorsing Biden Overnight Bernie Sanders coming into tonight with his coast to coast grassroots operation.

Mike Bloomberg on the ballot for the first time, spending hundreds of millions of his own money.

Elizabeth Warren facing a major test of her own tonight and this evening, those preliminary exit polls already coming in and take a look in Virginia.

55% of the voters said they would rather have a candidate who could beat President Trump than one who agrees with them on all the major issues.

That same question.

In North Carolina tonight, 62% of voters said it's more important to beat President Trump than a candidate who agrees on the issues.

And this question we thought was interesting out of Texas tonight.

After those late endorsements for Biden in Texas last night, 23% said they made up their minds in just the last few days.

76% said they made up their minds earlier.

We'll see how that in picked impacts this big night ahead.

A B C's Even Pilgrim begins our live whip around tonight on the campaign trail in the biggest state voting tonight in California.

Here's his report.

Joe Biden Heading into Super Tuesday with a rush of mo mentum.

It's been an extraordinary 24 hours.

Three of Biden's former rivals embracing him in a giant bear hug.

Senator Amy Klobuchar way have a president that has no empathy that cannot put himself in the shoes of the people of this country.

Well, guess who could do that?

Former Congressman Better Rourke.

I will be casting my ballot for Joe Biden and former South Bend Mayor Pete Buddha Jet and I'm delighted to endorse and support Joe Biden.

Clearly moved.

I know it's not much to most people, but to me it's that highest compliment I could give any.

The Biden campaign couldn't print these T shirts fast enough.

The message Democrats are unifying around the former VP Hillary Clinton, who has not endorsed a candidate, summed it up in an interview with ABC.

Is Lindsay Davis?

Joe Biden has said flat out Bernie Sanders could not be Donald Trump.

Do you agree?

I don't think he'd be our strongest nominee.

Know.

And and that's what this primary process is about.

Still, Bernie Sanders, Inner Super Tuesday as the undisputed frontrunner, declaring his grassroots army will win in November to be Donald Trump, we are going to need tohave.

The largest voter turnout in the history of this country.

Need energy?

We need excitement.

I think our campaign is that campaign, the Vermont senator brushing off Biden's endorsements.

We are taking on the establishment, and I fully understand no great surprise to me that establishment politicians are not going out.

But today, for the first time, Sanders facing a new challenge from the center former New York City Mayor Michael Bloomberg, on the ballot after pumping more than 1/2 a $1,000,000,000 into his campaign third place finish begun.

Um, you know it's only three candidates can't do worse than that.

Well, there's Elizabeth Warren also, uh, didn't like Warren voted today in her home state of Massachusetts, hoping for a Super Tuesday turnaround.

This is about getting out and talk people, Theo, all these campaigns watching this very closely as we head into the 90.

The Pilgrim has been traveling the Biden campaign.

She's in L.

A tonight and Eva, one person who has not publicly endorsing this race.

Former President Obama.

But you're learning tonight that he is quote, not discouraging.

The move's being seen among many of his own former advisers.

Tour Joe Biden.

That's right, Dave.

In the past 24 hours, we have seen three prominent members of Obama's former team endorsing Joe Biden, his chief of staff and his national security advisor.

We know Obama called Biden the night he won South Carolina to congratulate him.

But a source now also telling ABC News that Obama also called Pete Buddha judge and Amy Klobuchar when they announced they were ending their campaigns to congratulate them on their races and to talk to them about their next steps.

David all moving very quickly.

Already, the pilgrim are thanks to you.

Hi, everyone.

George Stephanopoulos here.

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