Turns out he's a reactionary weirdo.

But... The wiki page didn't really mention him holding any actual Marxist beliefs and was anti-USSR. Based on the description, he seems like a dead-on Q guy who was born at the wrong time. Except he apparently thought infiltrating the democrats was a better strategy than the Republicans. Although, trying to make the democrats increasingly conservative is a pretty well established mainstream strategy, so it's hard to call him fringe in this respect.

It doesn't seem to me that his ideas were actually influential at all in the American left or right, quite frankly. I think he's really more of an indicator that America is excellent at producing this type of guy.