Rex Tillerson presses China on North Korea; US warns preemptive strike is ‘on the table’

Secretary of State Rex Tillerson is expected to press China to use its leverage with North Korea, possibly introducing the idea of imposing secondary sanctions on Chinese companies doing business there. This comes as President Donald Trump tweets that “North Korea is behaving very badly.” NBC’s Janis Mackey Frayer reports for TODAY from Beijing.March 18, 2017