FiveThirtyEight has their daily primaries national polling aggregate up and running. If you're into such things, it's a pretty great tool. You can go to your state polling (if available) through a simple drop down menu too.

https://projects.fivethirtyeight.com/polls/president-primary-d/national/

Current national poll averages:
Biden
26.2%

Sanders
17.0%

Warren
14.9%

Buttigieg
9.6%

Joe Biden wasn't the one who brought up Corn Pop in the first place. This was a pool dedication in his old home town, some of his friends were there too, and they brought up the story. It's actually a pretty nice ceremony. Richard "Mouse" Smith (former NAACP president) tells some of the story at about 14:30 in the clip.



Corn Pop's obituary was shown in other threads. I just wanted the full in context video highlighted rather than the out of context clip trying to make Biden look like a senile old man making shit up.