With the attacks by other countries (word attacks) and by the media, and the left, etc. most would just come out and provide their proof.
Sometimes timing is ALL IMPORTANT.
I always saw it much smarter to give your enemies A BUNCH OF ROPE so they can make a really nice noose to hang themselves with.
Another issue is the LOCATION of the PROOF.
If it is HIDDEN, and we KNOW WHERE, It MAY be in a location that we can't just waltz into to show off the proof.
SO, patience is not only a virtue, but a POLITICAL NECESSITY.
When the time is right, so that we cannot be denied ACCESS to that HIDDEN PROOF, (Which we would be right now), you will see.