President Biden ain’t throwing in the towel just yet — ’cause top-level Dems are throwing another big fundraiser for him in the near future … and David Letterman‘s going.

The news just came down from AP — which says Hawaii Gov. Josh Green is hosting the shindig for Joe on July 29 out in Martha’s Vineyard … where they’ll be hanging out at a private home that apparently belongs to a friend of Green’s.

In terms of DL’s involvement … word is, he’s set to headline the get-together — so, in other words, he’ll be the talent … and probably moderate things as the emcee.

Unclear if any other celebs will be in attendance — but the fact this fundraiser will be happening at a residence as opposed to a facility … it kinda suggests this might be relatively small with a tight-knit group … in contrast to the ritzy ones hosted here in L.A. and NY.

More importantly though … it also signals that the Biden campaign has been right all along this week — namely, that their boss isn’t in fact dropping out of the race despite speculation.

As you know … there’s been a growing drumbeat of Dems demanding Biden step aside and make way for younger blood ahead of the November election — but the fact they’re whipping up donors for yet another round of fundraising strongly implies … Joe ain’t going anywhere.

Of course, he’s sidelined right now with COVID — but there’s already a hard date for him to get back in the mix … and all signs point to him trying to rally and score fresh cash.