I’ve been thinking about the delegate math.

The superdelegates have a combined 771 votes.

1991 is a clear majority of pledged delegates, but to win on the second (or subsequent) ballot, you need a majority with the superdelegates included, which means a minimum of 2375.5.

If the leader has any fewer than 1605 pledged delegates (slightly more than 40%), the superdelegates alone can’t decide the nomination. There aren’t enough of them.

In this scenario, the only way to win is to peel off delegates from other candidates.