By Noelene Clark
Updated July 25, 2016 at 12:00 PM EDT
Credit: SAUL LOEB/AFP/Getty Images

Sen. Al Franken slammed Republican presidential nominee Donald Trump as a megalomaniac and a con artist during his speech at the Democratic National Convention in Philadelphia.

The actor, comedian, and junior senator introduced himself to the audience at the Wells Fargo Center on Monday evening as a “Minnesotan, senator, and world-renowned expert on right-wing megalomaniacs.”

“I got my doctorate in megalomania studies from Trump University,” he joked. “Sure, I had to empty out my 401(k) and take a reverse mortgage on my house to pay tuition, but Mr. Trump, or rather some people who say they once met him, convinced me that it was worth it.”

Franken went on to call Trump a scam artist, saying that Trump University’s “School of Ripping People Off” ranks second only to “Bernie Madoff University.” He also joked that the university’s business school classes included “Bankruptcy 101” and “How To Leave Your Partners Holding the Bag” — the latter taught by a cardboard cutout of Trump — and said that the school’s library was “located on a shelf in the closet of the third floor in Trump Tower.”

In contrast to Trump, Franken endorsed Hillary Clinton as tough, smart, and prepared to lead. “I am proud to call Hillary Clinton my friend, and I can’t wait to call her Madame President,” he said.

Demi Lovato, Sarah Silverman, Eva Longoria, and first lady Michelle Obama are among Monday night’s speakers at the Democratic conclave.

See a clip of Franken’s speech below: