Putin: U.S. sending new weapons to Ukraine would have 'serious response'

Joining us now, former US ambassador to Russia and MSNBC international affairs analyst Michael McFall and retired fourstar general and MSNBC military analyst Barry McAffrey. And ambassador, you and I have spoken several times over the course of the past few weeks and you have urged the president to enact these sanctions on Russia. Your thoughts now.>> Uh this is an important positive achievement. I'm glad they finally did it. These are the first sanctions that the Trump administration has imposed.uh it's no ...