At commencement ceremonies, every speaker gets to be a comedian, even comedians. The competition was tough, but at least two of the best lines compiled by The Washington Post, came from politicians.

“I stand here humbled, gracious and completely naked under this robe.”
  --Maya Rudolph, Tulane University

“The UVA community has some experience with being defined by outsiders. It has been said that a rolling stone gathers no moss. I would add that sometimes a rolling stone also gathers no verifiable facts or even the tiniest morsels of journalistic integrity.”
--Ed Helms, University of Virginia

“Tisch graduates, you made it. And you’re f----ed. The graduates from the College of Nursing, they all have jobs. The graduates from the College of Dentistry, fully employed. The Leonard N. Stern School of Business graduates, they’re covered. The School of Medicine graduates, each one will get a job. The proud graduates of the NYU School of Law, they’re covered. And if they’re not, who cares? They’re lawyers.”
--Robert DeNiro, Tisch School of the Arts, New York University

…[Yale was] one touchdown away from beating Harvard this year for the first time since 2006. So close to something you’ve wanted for eight years. I can only imagine how you feel. I can only imagine.”
--Vice President Joe Biden, Yale University

Those of you who are graduating this afternoon with high honors, awards and distinction, I say, ‘Well done.’ And as I like to tell the C students, ‘You, too, can be president.’”
--former President George W. Bush, Southern Methodist University