Evidence is not necessary, because this is not a criminal or a civil case. It will be decided by the voters and the voters alone, based on whatever information is available at that time.
You can tell me that I cannot convict Cain: this is true. I cannot absolve him, either, nor can anyone. Each voter in the GOP primaries will decide,and collectively Cain will win or lose.
All I am saying is that my opinion is that he will lose, because based on other similar incidents, those who stonewall tend to lose.
I think Clinton served 2 terms as President of the U.S., if I'm not mistaken