Sessions was a placeholder. You can't force the hand of the Kabal while they still have controll over rogue nuclear states (North Korea, Iran). The world is connected and vastly different than it was two years ago. Flush Sessions (and all the effort they spent blackmailing him) and bring in the executioner.

Kabal is finally on the back foot. They have to stop us from seating the new Senate and making lifetime judicial appointments. If that happens we secure enough time (20 years) for the world to fully wake up. They don't have 20 years. We ensure that America cannot be collapsed from the inside during that timeframe. Think terms of surrender. Carrot or PEAS (Presidential Emergency Alert System / Stick)?