I believe Manafort has some piece detrimental to the DNC/False Mueller charge.
They couldn’t find anything on the offensive, so they went on the defensive.
In my opinion, they believe Manafort knows something detrimental to the Obama regime. He knows some of the pieces, enough to sink their ship.
If they believe Manafort has something detrimental to the Obama regime and/or the FBI under Mueller, then indicting him was probably the worst thing they could have done. As a defendant in a criminal case he will be able to demand access to any and all documents related to the charges brought against him, and might even be able to subpoena the FBI agents involved in those matters.
If true they will shut this investigation down rather quickly unless the deep state traitors think they can control the courts and juries. They may sacrifice one liberal but then it will end quickly and the moon bat left will go insane.