Harris' candidacy has led to surge in Black voter enthusiasm. It could make a difference in swing states
abcnews.go.com
There's a surge of support for Harris from Black voters and organizers who could make up lost ground for Democrats in critical battleground states.

“Enthusiasm” has always been a “flex” for GOP these recent elections.

Is that similar to a noise meter at events?

The enthusiasm equals 2 football fields plus 6 cubits.