An aborted joint venture agreement provides the factual backdrop for the 7th U.S Circuit Court of Appeals’ recent examination of when the business judgment rule can shield a defendant from liability under Illinois law for tortious interference with contract. The claim in TABFG LLC v. Pfeil, 2014 WL 1089552 (7th Cir. 2014), involved the principal of an LLC that was a member of a joint venture with the plaintiff for a securities trading business. The joint venture agreement provided that the defendant would …