National Security Adviser Jake Sullivan: America is "not going to stand by" on war in Ukraine

National Security Adviser Jake Sullivan joins CNN's "State of the Union" to discuss Russia's ongoing war with Ukraine saying America is "not going to stand by and allow one country to roll over another country and try to wipe it off the map. And we're going to build and have built a coalition of more than 50 nations to resist that and help the Ukrainians defend their own territory."