Starting in 2020, it will be a lot easier to track superdelegates endorsements – there will be a lot less of them that matter:

After a lengthy debate and a deal between supporters of Hillary Clinton and Sen. Bernie Sanders, the Democratic Party’s rules committee voted to created a “unity commission” that would dramatically limit the role of convention “superdelegates,” binding roughly two-thirds of them to the results of state primaries and caucuses.

“The Commission shall make specific recommendations providing that Members of Congress, Governors, and distinguished party leaders remain unpledged and free to support their nominee of choice,” reads the new rules language, “but that remaining unpledged delegates be required to cast their vote at the Convention for candidates in proportion to the vote received for each candidate in their state.”

This year, 433 of 712 superdelegates were DNC members. This change would have had little effect on the final outcome this year, but in the future, it will certainly give non-establishment candidates more time to win states without being so far behind in the reported delegate counts.