There is no bar whatsoever. Washington DC is a progressive-left-Democrat cesspool. Absolutely no one in their power-structure wants to indict Hillary because it would leave them greatly embarrassed and scrambling for a viable candidate.
Obama his Lynch are only going through the motions, so he can claim all due investigations have been done, to run out the clock, and get attention-deficit-disordered Americans tired and bored of the issue.
therefore, nothing will happen to Hillary. She knows it.
That's putting it kindly.