The aspiring congressman was given a high-profile role at this week's Democratic convention, introducing a video tribute to his late uncle, Sen. Ted Kennedy (D-Mass.).

"For my Uncle Teddy, politics was about people. He was from a big family," Kennedy said. "He understood that lives are measured not by line items in a budget, but by first days of school and last days of summer; promotions won and jobs lost; new homes, broken hearts, baptisms, funerals, and every precious moment in between."