It can also fail outright if voters and Congress pick up the scent of Emperor at midterms. History does not always repeat. If it did, we would not have had democracy to begin with.
I think in this case it will require the non-voters picking up the scent of a monarch. This is why I believe that point is yet to come (though I do believe that the belief that we are passed it is also very rational, only history will know).
