A 60-year-old case that'll be heard by a federal appeals court next month could set a precedent that could prevent special counsel Robert Mueller from issuing a final report on the Russia investigation, Politico reports.

It could even thwart Mueller from releasing a report to Congress, a potentially damning blow to Democrats if they don't retake the majority in November's midterms, Politico reports.

The little known and completely unrelated case: The disappearance of Columbia University professor and political activist Jesus Galindez, who disappeared in 1956 and is presumed dead.

A lawyer and author investigating Galindez wants the D.C. Circuit Court to compel the release of secret testimony given to a grand jury about the case. The Justice Department argues that it does not have the inherent authority to do so without congressional approval.

If the Court sides with the Justice Department, it could impact Mueller's ability to publish any report detailing any information given to a grand jury investigation into alleged Russia collusion.

"If the D.C. Circuit were to accept the Department of Justice’s arguments … that would have potentially enormous implications for the future of the information from the Mueller investigation. That could close out a path by which that information becomes public," Harvard Law professor Alex Whiting told Politico.

If Democrats win back the House in November, however, the case becomes moot. A Democratic-led Judiciary Committee could subpoena Mueller's report as part of an impeachment process, Politico reports.