Glenn Simpson, co founder of the pro Russian lobby group has pleaded the fifth. And will not talk to Senator Grassly's committee. Meanwhile, Trump surrogates have agreed to talk with any committee looking into the Russian investigation. It appears the real collusion with the Russians occurred with the Democrats and never Trumpers working against Trump. The fake Dossier bamboosled Comey who thought it was real. This is the real collusion.
http://www.washingtontimes.com/news/...p-dossier-ple/