Sessions is not picking up the white courtesy phone.
Imagine there was a left wing conspiracy to destroy a Republican candidate in a presidential election. Imagine that, failing that, the conspirators attempted to use the vast powers of the federal government to knee cap that candidate after he won the election. Imagine that their ultimate goal was to remove the new president through impeachment, to stymie the will of The People, and to protect themselves from discovery and eventual punishment.
What would be one of the most effective first strike measures they could take to accomplish those ends?
Of course, you'd move quickly to seize control of the chief federal agency tasked with investigations and law enforcement - the DOJ.
That would most easily be accomplished by seizing control of the chief executive of that agency through blackmail and threat of physical harm.
Having seized control of the AG, you would order him to stand down (recuse himself) from any and all investigations involving the plot, and force him to appoint one of your hand picked co-conspirators to run the investigations involving the plot. Such a person could also open new investigations into the new president - aka, a witch hunt.
Meanwhile, you would not allow the AG to resign, thus rendering the office of AG inert, immobile, and disarmed.
That's exactly what the plotters of a government coup would do, if they were playing for keeps. Now ask yourself if that's not exactly what we're witnessing.