Your friend "former NSA". The fact he's putting this crap on the internet means that he's either a liar, or he's incredibly unprofessional and likely has fellow sympathetic anti-Trump buds still in govt employment who are illegally leaking their info to him.
I do take this nonspecific info for what it is worth - which is nothing.
We now know that there is truth to at least some of what Trump claimed in his tweet.
The lib media is outraged that Nunes took this to the public. I suppose the GOP was supposed to sit quietly for years while this investigation quietly eroded Trump's presidency all the while the left (and friends like yours on the internet) continue to selectively leak negative news. I love that they GOP is starting to learn and play by the Dems own rules.
FWIW, I have little doubt that Manafort has Russian ties, but i will be very surprised if there is any evidence of illegal activity. It also doesn't matter very much given that Trump didn't like manafort & fired him in August to bring in Kelly Anne Conway.