Do Mattis News Today

Tomorrow, calling for sanctions on russia. will his credibility be taken as seriously, especially at a time when a foreign policy by this white house seems to be made 140 characters at a time on twitter. that remains to be seen. certainly a difficult task ahead for all three men. >> nbcs lucy kfanov, thank you. joining me retired general wesley clark and senior fellow at ucla-berkeley center. richard stengel and former managing editor of "time." rick, lets start with you. do mattis and vp penc...