Jesus Christ. The printed copy of the Mueller Report I have here in my office is 728 pages long and is full of cites to sworn testimony from a bunch of Trump campaign and administration folks and a host of others. You should read it some day. (And none of it relies on anything in the Steele Dossier. It barely mentions him. His "Dossier" is a red herring that really has nothing to do with with the actual investigation of Russian interference in the election.)