Not required.
You need to understand the rules of our new Trumpistic Logic:
It's axiomatic that Con-Man Cruz is guilty.
Ergo, the fact that evidence can never be found just proves how sneaky and duplicitous this shyster is. Moreover, anybody who can cover up evidence so thoroughly must be evil incarnate.
Every hour that passes without some kind of proof hurts Trump.due to association with NE management.
I am ready to drop my support for Cruz if there is something to this.
Come on Trump supporters.......WHERE"S THE PROOF?