HUGE! MCCAIN was notified by official documents that Uranium was being transferred to Moscow in 2015. He passed it off to a congressional liaison rather than handle it as the ranking member of Homeland Security and Governmental affairs committee, and the Investigations subcommittee.
Here’s the official response to McCain from the NRC. He should have asked more questions. https://www.nrc.gov/docs/ML1512/ML15124A777.pdf
This is also directly connected to Uranium one as the Tenex, the receiver of the shipment is a Russian State company and part of Rosatom which bought Uranium 1.
Search engine: https://adams.nrc.gov/wba/