The exact right question and MHO: There is no politcal upside for the President to go into the Clinonistas criminal operations. He's thrashing them quite soundly on the issues. Why complicate it with the pursuit of criminal activities that will be defended vigourously by themesleves, the media, and the entire democratic party?
He has an agenda and that stuff will not help him achieve it. I really think it's that simple.
A. The Presidential candidacy of one Hitlery Clinton
B. Justice
Not only that, but you can be sure Hillary isolated herself from any documentation that would support and indictment.
It is only his word against hers, and that won't win in court.