The Hatch Act forbids civil servants from engaging in political activities while performing their duties. I'm pretty sure Strzok, Page, McCabe and a few others have done that. Let their attorneys try going to court. That should be Sessions' position.
And never mind that Constitutionally, all people who work in the executive branch should only serve at the pleasure of the president. That's how it was before the Hatch Act. That's the Constitutional anti Swamp position.
I am very familiar with the Hatch Act. Perhaps you should familiarize yourself on the due process steps afforded all federal employees.