I think what David Brinkley was getting at with what is my limited ability for mind reading that I have is that the country was in shock. Or at least everyone covering this story was. The first U.S. President assassinated in a hundred-years. A man who seemed to have everything in life being assassinated by a man who had nothing. Jack Kennedy being assassinated by Lee Oswald. I mean think about that for a second.
If someone as powerful and as successful as Jack Kennedy can be assassinated by someone as little and as big of a loser as Lee Oswald was, than anyone can be taken down in America. And since 1963 a lot of very powerful people in America have either been taken down by small people or seriously weakened. Richard Nixon was essentially taken down over a third-rate burglary, comes to mind pretty quickly.
Jack Kennedy just after 1 PM November 22nd, 1963 had everything going for him, including bringing a divided Texas Democratic Party together. A Northeastern Liberal, a Yankee doing that by the way. In Dallas, Texas on a beautiful fall day in November with his beautiful wife getting ready for a parade in his name in Dallas. And hours later is assassinated by a little piece of trash who had nothing going for him in life. And perhaps the only thing he was ever successful at was killing a U.S. President.