At a bipartisan candidate forum in Chicago in January, Ms. Ives addressed the issue of gun violence.
“And you know how you’re going to solve it? Fathers in the home,” she said, as the audience booed.
Perhaps most offended was Mr. Kennedy, who was 4 years old in 1968 when his father, Robert F. Kennedy, was assassinated.
“Well, I wish I could agree with you. I didn’t have a father in my life. Somebody shot him,” he said, as audience members clapped and rose to their feet. Mr. Kennedy then walked off the stage and left the building.