How likely is diplomacy with North Korea at Winter Olympics? Vice President Mike Pence announced Wednesday that the U.S. will soon unveil the "toughest and most aggressive" economic sanctions on North Korea. He will lead the American delegation for the Winter Olympics in South Korea. Eurasia Group president and CBS News senior global affairs contributor Ian Bremmer joins "CBS This Morning" to discuss why these tougher sanctions are "promising," what China's been doing to put pressure on North Korea, and the role Kim Jong Un's sister could play in the country's delegation at the Olympics.