Hillary is no longer in office. Neither she, Obama, nor Comey, nor any of the other straw "criminals" Trump keeps talking about are in office either. All non-factors who did nothing. None were ever charged or ever will be. Remember, the GOP was in control for the entirety of Obama's last term.
It seems pretty evident that the real issue here is MONEY, as in controlling Ukrainian gas and oil. Parnas, Fruman, and Giuilani were plotting to gain control with the assistance of Team Trump. Investigating the Bidens was just a bonus.
The extortion/quid pro quo has been confirmed second-hand, but Trump has gagged anyone with first-hand knowledge from testifying. Pompeo, who is in hiding. Perry, who is also in hiding, and idiot Mulvaney. Wonder why they won't testify. Hmmm. They all know what was going on.
My guess is that Trump also stood to gain financially if Giuliani and Co. gained their objective(s), or perhaps access was in return for huge campaign donations by Parnas and Fruman through fake corporations they set-up. Unfortunately, there were some honest career diplomats standing in the way of a TREMENDOUS DEAL that would have garnered the Three Stooges millions, and also given Trump fake cover for his lies about the 2016 campaign and the Bidens.
It's only going to get worse for all of them. I can hardly wait.