Won’t happen because 8 years is more than enough. After the last 3 two-termers, one 6-year term and out looks better.
Clinton fatigue.
Bush fatigue.
Obama fatigue (and he still has 3 years to go).
8 year is more than enough.
Interestingly, that was one of the fixes in the Confederate Constitution of 1862....its Presidents could only be elected to single six-year terms. Of course the Confederacy never got to see how well it worked, with Jeff Davis defeated and captured four years into his term.