The US Constitution is so sclerotic it still doesn't have an Equal Rights Amendment; were the Old Country to turn into a de facto[0] dictatorship it would probably be by other means than constitutional amendment. Look at Imperial Rome: they kept the form of the Republican legislative body, yet demonstrated its value by appointing[1] an actual horse to it...<p>[0] if needed, <i>de jure</i> soon after merely by retroactive application of new law; cf <a href="https://en.wikipedia.org/wiki/Night_of_the_Long_Knives#Aftermath" rel="nofollow">https://en.wikipedia.org/wiki/Night_of_the_Long_Knives#After...</a> and <i>Ultima Ratio Regum</i>.<p>[1] [Edit: Caligula only threatened to; never apparently did: <a href="https://en.wikipedia.org/wiki/Incitatus" rel="nofollow">https://en.wikipedia.org/wiki/Incitatus</a> ]