To read the link, it seems that you need to subscribe to The Atlantic.
Without having had the opportunity to read the article, isn't withdrawing as candidate for president enough? Resigning from office seems unnecessary, unless Biden's health is far worse than I realize... but if his health is that bad, why is Biden wavering about whether to continue running?
Edit:
Jeffrey Goldberg, editor-in-chief of The Atlantic magazine, now hosts the PBS program Washington Week With The Atlantic. It's a short, 1/2 hour watch, every Friday and provides great insight into current US political issues. Highly recommended!