https://www.lawfareblog.com/what-make-mystery-judgment-re-grand-jury-subpoena
Slightly stale story, but very concise interpretation of fact pattern on the secret court case. MSM speculators tried to pin this on Trump Russian collusion.
Interesting conclusion “This appears to mean that the testimony or documents that the grand jury is interested in relate to some overseas commercial activity of the Corporation, not acts or activities within the United States.”
Mueller team wants evidence of foreign commercial activity of a (US?) corporation owned in part by a foreign country as it relates to 2016 election.