Re Christopher Steele and Jonathan Winer.

DoS FOIA reading room had 55 hits for search term "jonathan winer". This one is rather interesting from Steele to Winer which intimates additional ppl in the 'cool kids' Russian-Ukrainian clique. Quick look about seems that Winer and V. Nuland were besties.

https://foia.state.gov/search/Results.aspx?searchText=%22jonathan%20winer%22&beginDate=&endDate=&publishedBeginDate=&publishedEndDate=&caseNumber=