You have seen the comings and goings now of Trumpism, Brazilianism, and Brexism, 2016 to 2024 and the common theme is why they failed to persist in power ONCE THEY CAME TO POWER.
If you look at the evolution of democracy theory since 2016 paradigm shift from normal to extreme liberal democracies in some countries you and you adjusted your previous democratic thinking as now EFFECTIVE TARGETED CHAOS and THE NATURE OF THE COURT SYSTEM IN A CONJUNCTURAL CAUSALITY MODE play a key role.
If you take into account this, then you may be able to see that the necessary and sufficient conditions for normal liberal democratic outcomes to come to exist and persist has changed as conditions have changed.
And this raises the question: What is the necessary and sufficient condition for normal democratic outcomes to maintain power regardless of the coming and going of exism movements and dictatorship threats?
What do you think the necessary and sufficient condition is?
Note: The answer is short.