What does it mean to 'clinch the nomination' when superdelegates are involved?

After reading a number of impassioned defenses of why the Democratic presidential nomination should not be called next week on June 7th, I got curious. What’s the history here, since the superdelegates were added to the process? When a Democratic candidate hits the magic number of pledged delegates plus superdelegates, are they the nominee?

The answer: history says the first person to get to the magic number is the presumptive nominee, and says it unambiguously, even if the losers often disagree.

Here’s how it has gone since the superdelegates were added to the process.....

Summary

Anyway, I started this research 12 hours ago to answer a question for myself, so that as everyone on TV is spinning things this way and that on June 7th I have some context. What, if anything, have I learned?

First, most non-incumbent candidates have needed superdelegates to win, and the history of superdelegates has been that once a Democrat hits the magic number and becomes the nominee, superdelegates are more likely to flow to the nominee than from them.

Also, in the history of the superdelegates, they have always ended up supporting the decision of the pledged delegates, and their most important contribution has been to amplify leads of the pledged delegate winner so that they can be assured success on a first ballot, and avoid the sort of messy convention that harms a general campaign.

The major thing I’ve learned is that the press declares, and has always declared, the winner after they hit the magic number, and has done so in far more nebulous circumstances than this. Even in 1984, in which Hart won by a number of other metrics, in which the delegate count was the arbiter, and Mondale announced himself as the nominee, even with 38 percent of the popular vote to Hart’s 36 percent—even then, Hart may have claimed he still had a cunning plan, but no one begrudged Mondale the fact he was, for all intents and purposes, the nominee.

When you think about it, that simply has to happen. Things need to get done, and they need the nominee to do them. Except for Reagan in 1976, who chose a running mate after Gerald Ford was made the nominee, there aren’t a whole lot of non-nominee candidates going to the convention with their own vice president picked out. You get to do that because the numbers say you’re the nominee.

Meeting this number also allows the nominee to do the work of campaigning before the convention, establishing a message, building capacity on the ground, etc.

The press, for its part, has always understood this, from 1984 onward, and has named the nominee (or the “presumptive nominee”) the minute the candidate crosses the line with their combination of pledged and supers, and usually said something to the effect that they had “clinched” the nomination. They did that when Mondale had won far fewer states than Hart. They did that when Dukakis did not have 50 percent of the pledged delegates. They did that when Obama had not won the popular vote (yes, I know, Michigan—I hope we’re still not fighting this?).