He can pack the supreme court. Then limit it to something tangible.
Like first, say that 2 senators per state is silly and it needs to be based on population like the house if reps. Then say that we need a supreme court justice from all 50 states + D.C. or some shit.
Boom.
Then term limits, age limits… Ranked choice, strict laws in gerrymandering…
And we have a functioning Republic again.
POTUS?
KOTUS.