"... Roy Cohn ...": Here's the Wikipedia entry for Roy Cohn.
"... Michael Cohen/Tim Mack ...": Here's a link to the article co-written by Tim Mack that caused Michel Cohen to threaten him.
NOTE: The subject matter and language is pretty rough, so beware.
"... Executive Privilege ...": Here's the link to Polifact.com's explainer on executive privilege.
"... Business Insider/Biden ...": Here's the piece in Business Insider about Joe Biden demanding the transcript of Trump's converation with Ukraine's president be made public.
