I don’t know for sure, but I think the FBI can investigate whatever they want.
Where the problem comes is that the FBI has to refer the legal matter to the “justice dept.” which can refuse to prosecute as we have been seeing with the email case (which is a matter of national security). They will probably refuse to touch anything WRT to her (it?).
This is true...the FBI’s final report can be handed to the Justice Department and they just decline to proceed.
One might note...in January, a whole new Justice Department will arrive, and this report will still exist. So, a Trump AG might be inclined to proceed on Hillary, and the half-dozen people around her.
Trump might allow all of this to occur, and get to the final phase of a court situation....before pardoning her....just to demonstrate a point over how nice he really is.
I think the key point is that she simply can’t come into contact with classified material ever again. The behavior has been demonstrated and she’s just not capable of handling the stuff.
This seems like an “obscure” (for lack of a better word) investigation ..... why now? Worst possible time for Hilly - she needs McAuliffe & as an ages-old friend, supporter, business FOB (friend of Bill) ‘partner’, if he’s dirtied up publicly*, it makes her look even more corrupt. I agree the FBI can investigate etc. as you stated, but my “spidey sense” is telling me that there is more going on ...... DOJ/Obama are ok with this at a minimum.
We all KNOW he’s a sleazebag scumball corruptocrat, but getting the media to acknowledge it or talk about any of his dirty dealings with the Clintons has previously been a ‘non-starter’.