Nope.
The man is in rapid physical decline and right at that 2 year mark he will “fail to awaken from his sleep”. Coma. 25th amendment.
Nope. Dems will never use 25th on a Dem President.
FDR continued to be President long after he was really sick and incapable of carrying out his duties. Truman became President only after FDR died.
We shall see. Perhaps PredictIt has a contract we can bet against each other on this issue.