They did float the idea of really high profile people doing single days

Around 1%. It would be hilarious tho

He is pretty open about avoiding politics and preferring more “evergreen” comedy, so I’d guess the odds are extremely low.

No chance. He is way more successful than anyone who has guest hosted. He retired after over 30 years as a late night host and is still working. He has a very successful podcast, and now his own network. He doesn’t need it and likely would never want it. He is busy enough and has never been political. As great as he is, it just isn’t a fit or desire of his in my opinion.