Sad to say, I suspect it was aimed at our president. Ron Jr. has repeatedly exhibited an intense virulent, irrational dislike of Bush. He has publicly referred to President Bush as an ignorant drunk, said he suffered from "dementia" (a particularly tastless remark given his father's condition) and was unworthy of President Reagan's legacy, etc. He's a Nader supporter (at least in the 2000 election) who often gives in to the worst instincts of the spiteful fringe Left.
Here's just one example of Ron's nutty nastiness. (Someone with access to Lexis-Nexis or TV transcription service could track down some of his other even nastier remarks) :
About the the "no WMD" and dementia remarks...he's going to have to eat those words after the news of the last few days re: WMD's in Iraq.