Examining the state of war in Ukraine

As Russian troops step up their offensive in Ukraine, the governor of Donetsk in Ukraine is urging the 350,000 remaining residents to evacuate from the last eastern province partly under Ukraine's control. Meanwhile, Russian shelling pounded the cities of Sloviansk and Kramatorsk. Michael Kofman, senior fellow for Russian studies at the Center for Naval Analyses, joins Nick Schifrin to discuss.