Mark Halperin, a leftwing democrat hack journalist, made the point on Morning Joe today that it is getting late in the day for democrats to steal the nomination from Bernie if Hillary is indicted. The train may in fact have left the station with his series of primary wins. I was pretty sure there was no way they would let him have the nomination, but Halperin does have a point. It is the flip side of the republicans' Trump problem. The party elites would rather drink battery acid than see either as their party's candidate, but if they steal the nomination from them, they will have to deal with angry mobs waving pitchforks.
Halperin also said that senior democrats are uncomfortable with Hillary's lax approach to security with the email server. I am sure they don't appreciate the spot she has put them in. Defend her, as they will obviously, and look like the worst sort of hypocrites who are ok with a war hero being prosecuted but who circle the wagons for a politician. They are depending on Obama and AG Lynch to have their backs and refuse to indict, no matter what the FBI turns up, but then they risk everything from FBI agents going public to maybe even the Director resigning in protest.
My guess is they put the FBI equivalent of Lois Lerner in charge, ie a highly partisan hack who can be counted on to do the right thing and exonerate Hillary, whatever the evidence. Then they can fall back on the tried and true excuse that the "professionals" in the Justice Department and FBI found Hillary to be beyond reproach. Move on, nothing to see here folks.