Another theory is that there is still another shoe to drop, RICO style charges related to the Clinton Foundation scandal.
It is a long shot. IIRC, Elliot Richardson resigned rather than obey Nixon’s order to fire Watergate Special Prosecutor Archibald Cox.
Even if they were to investigate the Clinton Foundation, do you really think any charges would be brought there? I can’t see that happening. They can use the same excuse. “There was no intent of wrongdoing.” It won’t matter if they are guilty as hell, just like here. No charges will ever happen. The only repercussions that will come for the Climton crime syndicate will be when they face the Lord.