FWIW, lots of people want to know who this Tozy Rezko cat that Bill Barr is talking about is.
Salon has a story about him up.
Who really doesn't see much there there. I pretty much read it and thought "Yep, Chicago politics." It's certainly less exciting than a leading candidate recently using ethnic slurs.
Edited to fix a typo, specifically the one Bill alludes to in the comments.