The advantage of doing it before the convention is that Democratic voters will feel like they had a convention that mattered—stirs up their juices—gets them motivated.
One of the big issues for Democratic voters these days is they are starting to get a clue that a very tiny elite runs their party.
An open convention would quell that perception—even if the reality might be different.
Generalissimo biden’s handlers have shown that the rats don’t care what the peons think or what the courts have decided.