Foreign Intelligence Surveillance Act
Trump either did or didn't want this to happen — no one really knows.
The mind of a "very stable genius" works in mysterious ways, apparently.
A letter to Democratic members of Congress aims to make government spying an issue for future presidential candidates.
Privacy advocates have criticized the law for allowing the incidental collection of data belonging to millions of Americans without a search warrant.
WHAT'S HAPPENING
And they say finding out would jeopardize national security.