>> very far left

On what grounds? AOC, like Sanders, advocates for centrist policies like those in the UK. AOC is a left leaning centrist. The rhetoric in the US does label her and Sanders extreme left but that’s evidence in favour of my point - there is no left in the USA.

Who is the USA’s version of John McDonnell telling us all that there’s a lot to learn from Das Kapital?

AOC is centre left, somewhere between Canada’s ruling Liberal party and the NDP currently endorsing them (its a minority government this time). NDP is a little further left IMO but not far off.

Centrists.