They had better start bringing some charges soon. If the Dems win in 2020, all charges and investigations will be dropped. Time is short.
If that happens, Sessions should be figuratively strung up. He could have started this whole process in 2017, but chose to sit on his hands instead.
When history looks back on this, he will be shown to be the spineless, pusillanimous simp who cowered from his duty to allow this travesty to go unpunished.