The leftism in the world are more or less marxist, the diference is between the moderns vertions of Mensheviks and Bolsheviks and nothing more and, at least for me, the democrats are part of that, i disagree with the marxist doesnt exist in the US society if you see organizations like BLM or the Antifa and, casually, their members support Biden.
I didnt listen nothing about you say in the second paragraph, do you have any link to read?
Well, they are the first power after the world war 2 and they will continue with that hegemonic form to rule, that is clear and wont change, both know like latin americans what is the meaning of the Monroe doctrine "America for the Americans".