"All documents" "related to Russia?" That could be just about anything, even it tangentially related to russia.
Whomever thought this meuller witch hunt was winding down was not thinking clearly.
Business loans.
Mueller is going after financial crimes and also links to Russian banks.
That was the target from the get-go,collusion the excuse.
You think a platoon of lawyers and a Division of accountants could not find anything wrong in your tax files !?
Time to hire the State Department shredding staff Hillary, Powers, and Rice use when such requests are made.