Only option now is to withdraw the plea, and fight 100% and expose all of the DOJ and FBI setup. Get every agent on the stand, have them answer under oath if they were lying in the 302 (federal crime) or lying now (perjury) about what Flynn was doing and what they did.
When sh*t gets real for the DOJ and FBI maybe they start to understand it will only get worse.
They wouldn’t let him withdraw the plea.