Biden’s Norm-Shattering Response to the Post-Debate Crisis

The Democratic Party’s presidential nomination crisis began as a visceral reaction to President Joe Biden’s public discombobulation. And elements of his judgment continue to correctly play an important role in Democrats’ belief that Biden is no longer up to the job of saving the party and the country from Donald Trump.

But even aside from Biden’s polling (which is bad) and his performative affect (which is worse), Biden’s behavior during...