That says something.
I think that it speaks mainly to the fact that Splash is a Portuguese Water Dog. I really have a hard time believing that a savvy politician like Kennedy would ever make jokes about such a tragic episode in his life. If for no other reason than it would reflect poorly on his public persona with the voters or could become useful campaign ammunition for anyone who wanted to run against him for the senate. The subject of Chappaquiddick would seem to me one that he would go out of his way to avoid.