No one has to "pony up" classified evidence to some know-nothing rightist clown on the internet to placate his asinine demands and give away confidential info to the enemy in the process. Life doesn't work that way, conservative fuckboi.
You might not have noticed but the CIA and all the other alphabet "intelligence" agencies have a slight credibility problem these days, saying "We have secret evidence that proves the Russians did it but we can't show it. Just believe us, it's a slam dunk!" isn't very convincing