Rex Tillerson commits the US nuclear arsenal to defend Japan and South Korea. This policy was put in place under Obama.
Is Japan and South Korea worth going nuclear over?
US Commits Nuclear Arsenal to Defending Japan, South Korea
Tillerson Insists US Offers ‘Full Range’ of Nuclear, Conventional Capabilities by Jason Ditz, February 16, 2017 With a new focus on North Korea after a recent ballistic missile test, Secretary of State Rex Tillerson met with foreign ministers in Bonn, Germany, pledging the whole of the US military, including its massive nuclear arsenal, to the defense of Japan and South Korea.