I think there's a real good chance the Clinton Foundation was effectively operating as a CIA front ... and we had a U.S. Secretary of State who was a CIA asset.
Prosecuting someone like that would give her the legal right to call half of the senior officials of the Obama administration as witnesses for the defense, and compromise a huge pile of national secrets in the process. I don't see any way a prosecutor could ever allow that.
A huge pile of national secrets are already compromised by her and her minions’ actions.