Putin is a strong and stable leader, exactly what Russia needed after the end of the Cold War. Our Constitutional Republic would not work for them because Mobs or other criminal gangs will take advantage of anarchy in Russia.
I don't disagree with you on that. I just think that if they go for a constitutional amendment, it will lead to the slippery slope area, in a matter of speaking.
It's a difference whether you mean strong and stable leader like Abraham Lincoln (who was a strong and virtuous character) or maybe like a South American caudillo?
As far as I know the US didn't need any "strong leader" in this sense after the Revolution of 1783.