retiring's supreme court justice, whose confirmation he presided over as chairman of the senate judiciary committee. >> i've tried to look at the broader issues at stake, when we can from an amani to court. to consider the values by which our nation defines in redefines itself overtime, and the means by which government can best express and defend those values. so, we welcome you here today, judge, not merely to measure your competence to sit in court, but to engage us in discussion of those importing matters. >> our next guest, neil castillo graduated from yale law school in 1995, and a year later, he was helping write supreme court opinions as a clerk for justice, stephen breyer. joining us now, neal katyal. -- and former acting yun as -- msnbc, legal analyst.