There are a lot of folks involved in this. (like most all of Chicago's politians) Investigations into it have been going on for a long time too. (back in 2005 Blago was referred to as 'Public Official A' in the Rezko corruption trial.) I'm not sure if you're familiar with the Rezko trials but Obama is connected to Rezko too. (tho' Obama just brushes it off as a 'mistake'.) In my opinion, Rahm Emmanuel was Obama's bagman for the senate seat. I also believe that Obama and many others were just too savy to get tied to Blago's schemes. Jesse Jackson Jr. is 'Senate Candidate Number 5' on the tapes. Time will tell if his testimony will get him off with the Feds.