Also, I didn't get the impression that he was congratulating himself, just being a bit dramatic, and clearly pretty emotionally worked up over the fact the Clinton campaign was resorting to such an underhanded and dirty tactic. But, he definitely did go more than a little overboard. He probably could have been much more effective in getting more info or changing the caller's mind if he had been calmer. Now the caller will just remember being yelled at by some angry person, and not the message he was trying to get across.
[Edited because I'm clearly still half asleep and probably shouldn't be commenting HN until after I get out of bed and have some coffee.]