The OP title is propagandistic bombast … because nobody can know the future, especially with a man as fundamentally unprincipled and opportunist as Donald Trump.
Will Trump survive as a free man until next November? Probably. Can he win? Who knows? If he does win will he become the first authoritarian strongman or even dictator of the U.S.? Will he have the U.S. leave NATO and the U.N.? Will he try to create a new “Triple Alliance” of great powers (with China and Russia) to effectively divide up the world? None of that is really knowable.
In reality, using Presidential power — and especially with a majority in both Houses of Congress — an unprincipled President has immense, almost unlimited power. He can declare a state of emergency and use executive power to purge his enemies in government, and he can appoint total sycophants to replace them. Who knows for sure what a bitter Trump seeking “retribution” might do? A President can pardon almost anyone and has immense untested power as “commander-in-chief.”
If Trump wins a close race and decides in his own interest to appear benevolent, he will do that. He can even decide to tack “left” for awhile. If he wins big he may decide right away to try to purge or sideline the whole top level of civil servants in our security and cabinet level officialdom.
People love to write nonsense, to say this or that outcome is “certain,” or on the other hand … “patently absurd.”
I say history and the unprecedented situation we face indicates Trump and his “movement,” should it come to power in 2024, is a grave danger to democracy and our Republic. But things may take awhile to mature, since his actual “movement” is still very immature and lacks seasoned and disciplined cadre. There are the Bannons and others of course. But they are mostly amateurs, both as fascists and in actually governing.
It is also possible that Trump, being basically just a cunning moron in charge of a populist personality cult, might end up getting himself assassinated.
The safest and best result for the nation as a whole is without doubt for Trump and his allies to be clearly and solidly defeated by U.S. voters in the 2024 election. The nation will certainly survive 4 more years of Biden and Democratic rule. The economy may even do well in the next period. But 4 more years of Trump would likely be more than risky, it would be madness and could potentially destroy our Republic.