Former Trump national security adviser says upcoming months are "really critical" for Ukraine

Ret. Gen. H.R. McMaster, who served as national security adviser in the first Trump administration, tells “Face the Nation with Margaret Brennan” that the longer-range missiles the White House are sending to Ukraine “can make a difference” in the final days of the Biden administration.The result, McMaster said, is the next few months are “really critical” for Ukraine.