Is it though? Mussolini ruled in Italy 21 years, Hitler ruled for 15. And the reason both of them fell was on account of the very concerted effort of an extremely powertul alliance of foreign powers waging unrelenting war against them both for years. Otherwise they would have ruled to their natural deaths, and their heirs would have taken over.
What happened during WWII is not a scenario which is likely to occur in present day US. There is no powerful alliance going to wage unrelenting war against the US fascist government. On the contrary China and Russia applauds what is going on.
Your comment is a good example of why history doesn’t repeat itself, even though much of it is very recognisable.







Why does fascist regimes never last 50 years? Because a powerful alliance of countries relentlessly vanquish them, historically. No such powerful alliance is present today. You should not make historical rules of whay is not rules at all. You have learnt the wrong lesson from history.