WATCH: President Barack Obama’s DNC Speech

FULL: 4 More Years? President Obama speaks at the 2016 Democratic National ConventionFULL: 4 More Years? President Obama speaks at the 2016 Democratic National Convention2016-07-28T03:48:53.000Z

President Barack Obama made a resounding appeal for Hillary Clinton on Wednesday at the Democratic National Convention.

He declared his former secretary of state would help defend his legacy in the White House, and continue his unfinished work.

“A lot’s happened over the years. And while this nation has been tested by war and recession and all manner of challenge -– I stand before you again tonight, after almost two terms as your President, to tell you I am even more optimistic about the future of America,” he said.

The President said she is a better qualified candidate than even himself or her husband, former President Bill Clinton.

“I can say with confidence there has never been a man or a woman — not me, not Bill, nobody — more qualified than Hillary Clinton to serve as president of the United States of America,” Obama said.

“It’s not just a choice between parties or policies; the usual debates between left and right. This is a more fundamental choice — about who we are as a people, and whether we stay true to this great American experiment in self-government.”

Obama also criticized Donald Trump, and rejected the GOP nominee’s notion that America is in a dire situation.

“America is already great. America is already strong. And I promise you, our strength, our greatness, does not depend on Donald Trump,” he said.

“He’s not really a plans guy. Not really a facts guy, either,” he said. “He calls himself a business guy, which is true, but I have to say, I know plenty of businessmen and women who’ve achieved success without leaving a trail of lawsuits, and unpaid workers, and people feeling like they got cheated.”

Obama said the message at last week’s GOP convention in Cleveland was a “deeply pessimistic vision of a country where we turn against each other, and turn away from the rest of the world.”