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.