potential supreme court vacancy. welcome in and congratulations on the book as well. talk about the role that justice stevens plays. most people aren't court watchers and less than 1% of americans could name justice stevens. he had a huge impact. tell us why he is important? >> i don't think when president ford picked him to sit on the supreme court he could have imagined he would be the leader of the liberal wing of the court. that is what he became. because the liberal wing is in the minority most of the time he often leads through his dissent. he has led through majority opinions and also during dissents. he led through the strong defense the citizens united case. >> 90-pages of defense. >> strong words. >> shannon: no doubt he still has it. he is in good health and completely onward and able to