later, dalia lithwick. each morning at 7:00 a.m. eastern with the day's news. a look at iran's presidential election and what is ahead in tehran. >> next, a conversation with u.s. supreme court justice john roberts on some of the court's decisions. he is joined by judge harvey wilkinson. serving on the fourth circuit court of appeals. it is over 30 minutes. >> could we have you take your seats, please? >> good morning. we have a very extra special program this morning. and it will focus entirely on the supreme court. chief justice marshall worried that the supreme court's role in the tripartite government would not be fulfilled if the court continued issuing multiple opinions. one from each justice. as was the custom in england at the time. he thought it important that the court speak unanimously as an institution. his strategy for achieving this basic and it was a fundamental strategy, he conference cases after dinner. after serving wine which he personally purchased and brought to the court. in that state of euphoria, the court was able to work through the pr