The speech, which was met with resounding cheers, came hours after the Trump children got to announce, along with the New York delegation that their father was the 2016 nominee for the Republican party.
Trump Jr. went on the attack against his father's Democratic opponent about Benghazi.
“Secretary Clinton's state department ignored their request for help on the night in question and in the weeks and months leading up to the attack," he said. "It was a tragedy and one that would be repeated should she when the election. Who will take that call at 3 o'clock in the morning?”
Trump Jr. said his father was his “mentor,” praising how he ran his companies and how he forced his children to listen to people based on their character rather than their credentials.
“We didn’t learn from MBAs — we learned from people who had doctorates in common sense,” said Don Jr., who like his father and sister Tiffany, who also spoke Tuesday night, attended the University of Pennsylvania.
“His true gift was a leader is that he sees the potential in people that they don't even see in themselves,” he said.
The eldest Trump child energized the audience and had the majority of the crowd on their feet by the point when he was listing off ways that his father was going to lead if elected.
He said that his dad will be a president “who says what needs to be said and not just what you want to hear.”