That's been his nickname for quite some time....given to him by Britons who understand who he is far better than those who voted for him.
I lived in London for a couple of years in the 90s so Red Ken's proclivities are well-known. I guess I thought being Mayor of such a cosmopolitan city where Americans make very substantial contributions to the vibrancy and vitality of that great city might have changed his spots.
I guess not.
Livingstone wouldn't know the difference between an economic blockade and a trade embargo if they bit him on the bottom.