> [Trump... Biden... ]

I've never mentioned either, nor do I assume what you think about them.

> So generally the overall political trend in the United States is to be like this.

The question I'm pondering isn't "what the trend is to be" but rather "why it has to change". Thinking about who and how could change it should wait, lest we end up putting the cart before the horse.

> You could ignore history if you want and hope for something different.

Being careful about not falling into the same traps as before isn't "ignoring history", it's learning from history, which is mostly the opposite of repeating it, because repeating the same thing with the same bad result is the definition of idiocy.

So that's kind of the point. The Democrats are basically going this direction too. The Republicans since world war I have been inherently isolationist.