Sessions goes in as VP, gets appointed to the Court, Trump appoints a replacement VP, Congress okays the appointment, midterms roll on up in no time, the new VP helps the Pubbies not only hold Congress, but extend their majority. Trump and his new running mate are reelected.
Could happen, I guess... presuming we last that long as a country - without revolution, civil war, financial collapse, foreign attack, invasion, etc...... G*d only knows....