Don't you feel it almost has to be something tangible ... visible...to create such a visceral reaction? It's late, and I've the beginnings of a migraine, but you know what I mean?
It's going to have to be recent.
'nam is played out. The MSM doesn't give a S*** about Paris meetings, Sandanistas, or no Senate record. And whatever it is you need good video.
But I believe the source is the Hillary-camp and the target is the regular Democrat for the purpose of not electing Kerry and keeping him out-of-the-way in 2008 for Hillary. In that scenario, any credible allegation that would amount to a "hot button" would do, e.g. a Democrat recounting Kerry speaking out against Jews, appearing in black-face, excluding homosexuals, etc.