Former Gov. Rod Blagojevich, awaiting trial this summer on federal corruption charges, and in the meantime appearing on “Celebrity Apprentice,” appeared at Northwestern University on Tuesday to talk about ethics. He was invited by a Northwestern student who is part of the Young Democrats club. Here is the report by my Sun-Times colleague Natasha Korecki on how Blagojevich was greeted with laughs and boos–and told the kids he never cheated in school.