The horse is still dead

Andy Schmookler flogs the dead horse of impeachment again.
I'm still waiting for him to understand why Democrats waited - not enough evidence to convince enough people.
Now he's down to the maybes.
Maybe this time the waiting will pay off, and the Democrats will get yet another moment that can launch them powerfully into conducting the necessary impeachment process:
Maybe Don McGahn will testify, and he’ll prove the witness that moves the proverbial needle of public opinion;
Maybe the Democrats will be able to get some of Mueller’s deputies to testify publicly, and maybe they will prove to be the kind of witnesses that understand both what is important for the public to understand about what they discovered and how they as prosecutors must communicate to convey to the public what the people need to know.
Maybe all these matters the Democrats have taken to Court will get resolved quickly enough that the process of public education that they’d hoped to start months ago will finally get rolling in a powerful way.