He deposed a few witnesses, including Lewinsky, and gave the closing speech. Might have saved Bill from being impeached in the Senate, no?
Sen. John Edwards began his career in the Senate with a bang. Thirty days after being sworn in, the Clinton impeachment trial was in session, and Edwards--a dashing North Carolina trial lawyer--was one of three senators presiding over the depositions of Monica Lewinsky, Vernon Jordan, and Clinton aide Sidney Blumenthal. Party leaders asked Edwards to give the closing speech in Clinton's defense. "I watched you suffer," he told his fellow senators as they deliberated the president's fate. ". . . I now have a boundless faith in you." As political theater, it seldom gets a whole lot better than that.
http://www.usnews.com/usnews/news/articles/040216/16edwards.htmThe two-day question-and-answer session became an opportunity for senators to throw softballs to their respective sides. Republican senators turned their questions into Trent Lott, who sent them on to a team of three Republican senators who weeded out the unhelpful questions, and put them in an order suiting the manager's goals. A list of 179 additional proposed questions were left in a binder for any senator willing to "ask" them. Democrats also orchestrated their question-asking, deciding on a strategy of leading with a series of prepared questions, then improvising to best suit the flow of the arguments. Chief Justice Rehnquist asked the questions, first one from the Republicans, then one from the Democrats. One of the few questions to produce any real surprise came from Senators John Edwards of North Carolina and Herb Kohl of Wisconsin. The two Democratic senators noted in their question, that "both sides have spoken in absolutes" while "it strikes many of us as a closer call." In view of this, Edwards and Kohl asked, "Even if the President engaged in the alleged conduct, can reasonable people disagree with the conclusion that, as a matter of law, he must be convicted and removed from office--yes or no?" Manager Lindsay Graham dismayed many of his Republican colleagues when he answered, "Absolutely." Graham admitted the Constitution gave no definitive answer and said, "If I was sitting where you are, I would probably get down on my knees before I made that decision."
http://www.law.umkc.edu/faculty/projects/ftrials/clinton/clintontrialaccount.html