I don't know and don't really care. When I vote I don't rely only on evidence admissible in court. Most of the country does not follow politics as closely as some of the people here. We see what we see and vote on how that seems it will affect us.
I also like to keep my anti-tiger rock on me at all times. I don't really care that there's no evidence that it works. All I know is what I see, and I haven't seen any tigers.