"In Derrida it's even more obvious (and explicit). Anyway I was never much interested in that period of French thought, which the exception of the very early and very late Derrida."
I wrote a review of Derrida's engagement with Marxism here: http://www.culturewars.org.uk/index.php/site/article/ghostly_demarcations2/
(Unfortunately the web-publisher took all the footnotes off it)