Is there any good explanation for, if Biden ends up dropping for whatever reason and Bernie is still in the race, why nominating someone other than Bernie makes sense? Even taking the "somebody who can't win more than 30% of the electorate" charge at face value, anyone else being nominated as a replacement would have significantly less or even 0.0% if it gets really wacky and someone like Cuomo gets propped up. The idea that since Joe Biden is a "moderate", he should be replaced by someone less odious that occupies a similar ideological lane. However, this primary has made it clear that not many are voting along ideological lines so this really only makes sense if you're an online politics nerd or have some other form of pundit brain. A plurality of voters circled the bubble for Vice President Joe Biden, not some vague concept of "a moderate", because they like him, trust him, like his policies, consider him a safe bet, or a multitude of other reasons. None of those traits are going to be magically projected onto another candidate, especially one that wasn't in the race to begin with.