Since we've spent the past 60 years talking about how horrific communism and extreme left is, even fighting multiple wars over it, we don't really have a presence of far leftism.
I feel like it's cyclical at this point. We hate the far left so much that people become fascist. A fascist dictator rises. Everyone realizes how this was a bad idea, and we equalize. Generations forget, and we progressively move right again til another fascist dictator comes in.
So no, there is no political power in America with true far left views, and our boomer gov would do anything to keep it that way.