How long does the Biden Presidency last?

A few months ago, Pelosi was talking about crafting legislation to clarify the 25th Amendment processes (specifically Congress' role) in removing a President. Initially everybody thought she was referring to Trump, but the conspiracy theorists advanced that she really meant Biden. It was a little out there, but pretty clever.

The next one was the Burisma / China payment to Hunter scandal, which was argued to be leverage to get him to resign in lieu of impeachment. Pretty clever as well, and the media's sudden focus on Hunter's "tax problem" and acknowledgement that the whole thing has been under investigation since 2018 has been stoking those fires.

I don't think he'll make it 4 years simply due to his cognitive decline, but you never know... Reagan pulled off his last 2 or 3.