Cornell University law professor Michael C. Dorf discusses a statement by AT&T CEO Randall Stephenson calling his company’s decision to hire Donald Trump’s personal lawyer Michael Cohen “a big mistake.” Dorf describes under what circumstances AT&T’s hiring of Cohen would amount to a crime, and under what circumstances his hiring would not only be legal but a corporate obligation. As Dorf explains, the proper classification of the decision requires more information than the public currently has.