An interesting, and less recent, article in what Durham may be up to. And I don't think the author is a fan of the possibilites.
https://www.justsecurity.org/71647/what-durham-is-investigating-and-why-it-poses-a-danger-to-us-intelligence-analysis/
What Durham Is Investigating and Why It Poses a Danger to US Intelligence Analysis
U.S. Attorney John Durham’s investigation poses a serious threat to US foreign intelligence collection and analysis.
https://www.justsecurity.org/71647/what-durham-is-investigating-and-why-it-poses-a-danger-to-us-intelligence-analysis/