Maybe Biden should:

1) Counsel panicking Democrats to calm down; campaign like crazy; poke fun at himself for his stumbling performance; and hold frequent press conferences/interviews to show he's all there.

or:

2) Withdraw.

Pretending it didn't happen isn't going to work.

Anyone who creates media that third parties publish should always, always make a back-up of what appeared online.

I learned this the hard way when a former employer disappeared years worth of my blog from a major news organization's website.

It still sucks when companies take down archives, as Paramount has done with MTV News, but at least there's the possibility of resurrecting some of it if individuals save it.

https://variety.com/2024/digital/news/mtv-news-website-archives-pulled-offline-1236047163/