Its more like 100%
It should be 100% but with the years of Obama education I can see how people will think Biden can last.
https://www.rasmussenreports.com/public_content/politics/elections/election_2020/59_think_biden_unlikely_to_finish_a_four_year_term_in_white_house
59% Think Biden Unlikely to Finish A Four-Year Term in White House