Because Obama's SuperPACs are lining up behind Butt. So Biden either plays the Obama card NOW or he can tell the old folk's home how he was a 'toothless wonder' in 2020 when people had forgotten how bad a plagiarist he was.
Except Obama didn't need the eye of the needle, because he had a larger (albeit inch-deep) constituency than Butt.
What's the equivalent of "racist" for hating a f@g? "Homophobe"? So Obama's SuperPACs have this mad dream of calling everyone homophobes to force them in line behind this f@g? Are you kidding? That word doesn't have any impact because it doesn't have any history. F Stonewall, F 'em all.
And if Biden doesn't make that direct argument, and make that connection that these Obama SuperPACs are outright delusional on the same level as Sander's Socialism, then he's toast. It's a big job and he's not up to the task.