Trump's plan seems to be: 1) force Sessions to resign. 2) appoint Giuliani to be attorney general during the Senate recess session as a way to avoid the Senate confirmation process. 3) ask Giuliani to fire Mueller, who is investigating bribery, extortion, and money laundering in the Russo-Trump empire. 4) profit!
But Senate Democrats are getting ready to thwart the plan at step 2. From CNN:
Using the threat of a filibuster, Democrats plan to force the Senate to hold pro forma sessions — a practice both parties have carried out to block recess appointments from presidents of opposite party, Democratic and Republican aides say.
Recess appointments let a president install nominees who normally must be confirmed by the Senate; their terms would run through the end of the "next session" of the Senate, but the "pro forma" sessions essentially means the Senate is never in recess.
Image of Sessions used in collage: Flickr/Gage Skidmore Giuliani: Medija centar Beograd/Wikipedia