We're in the election season, but, hey, guess what the Vice President's job description and single biggest duty is (US Constitution, Article 2, Section 1, Clause 6 -- to take over the duties of the President when the President is incapacitated. The ONLY person who could be reasonably tapped to take over when Joe Biden suddenly decided that he could not continue is the person whose job that was. Which is why we have a Vice President, and why every NFL team has a 2nd and a 3rd string quarterback.