“Mr Barr wants to know more about the C.I.A. sources who helped inform its understanding of the details of the Russian interference campaign, an official has said. He also wants to better understand the intelligence that flowed from the C.I.A. to the F.B.I. in the summer of 2016”

https://www.nytimes.com/2019/06/12/us/politics/russia-investigation-cia.html