Four years after the passage of the USA FREEDOM Act, Section 215 of the Foreign Intelligence Surveillance Act (FISA) and its related “lone wolf” and “roving wiretap” provisions are back up for reauthorization. Section 215 is best known for being the portion of law used to justify the dragnet, warrantless mass collection of tens of millions of Americans’ phone call data, as revealed in 2013 by Edward Snowden. Although the USA FREEDOM Act of 2015 did make some substantial advances in curbing warrantless mass surveillance of Americans, disclosures over the intervening four years have borne out concerns that it was an incomplete reform.