Bernie could not today get enough delegates for a first ballot win at the convention

You need 1,991 to win on the first ballot.

If no candidate wins on the first ballot, all delegates become unpledged. 

There are 4,750 delegate votes on the second - and any subsequent - ballot. 

This total is comprised of the 3,979 formerly-pledged delegates from the first ballot as well as 767 automatic delegates with a full vote and 8 automatic delegates with a half vote.1  

This means there are 775 automatic delegates with a total of 771 votes, with 4,750 equal to 3,979 + 771.

Since there are delegates with a half vote, a half vote is considered a whole unit of delegate for any ballot after the first round.  

Half of 4,750 is 2,375. 

Therefore, the requirement is 2,375.5 delegates to win the nomination when all delegates are voting.

Bernie has 60 already and Wikipedia says only 1,357 are available today.

No polls reflect today's new and more Biden-friendly candidate lineup.

Bernie supporters point out that this has not changed, that Biden so far has only shown the ability to win one state.

And that, they do not add but they certainly know and expect you to know, was courtesy of a majority black electorate not at all typical of the nation as a whole.

Sanders is campaigning as he did in 2016, running at the end against the Democratic Party and the majority of Democratic voters who are not and don't want to be socialists.

Bloomberg is and has been running mostly against Bozo.

Super Tuesday: crucial vote under way as Democrats battle for nomination

When do the two stories come together?

The one about the impact of the coronavirus pandemic on public activities and the other about the massively public activities of this campaign and election year?