Via Buzzfeed: Obama Appeared At 1996 Event Hosted By Socialist Group.
The whole of the post is a paragraph that notes that this is “a reminder that the President presented himself as much more progressive during his time in Chicago” and the following flyer:

Seriously, it is just so very suspicious that a Democratic candidate for State Senate might, you know, go places where voters might be. This is straight out of the Communist Manifesto! Plus, their were two political science professors (you know how they can be) in attendance. Plus, one of them was named Joseph which was the first name of one of the most notorious communist mass-murderers of all time. Who would name their child after such a person?









