The Trump tweet re OIG, Sessions and DOJ may signify the start of the campaign to get people on board with military tribunals.
The Justice / court system is so fucked up and politicized that military tribunals may be the last bastion standing when the dust settles.
It may be that the DOJ is so corrupt Sessions can't corral it. You have the circuit judge decisions re immigration/Daca, and even the OCare SC decisions have been quirky.
May be Trump just tweeted the truth and it's time to look for a venue that can be trusted.