>> on wednesday we learned of president trump's plans to withdraw american troops from syria. isis, trump claimed in a tweet, has been defeated there. on top of that shock, a bigger one came the next day as secretary of defense james mattis announced his resignation in a letter to the president. in it mattis made his own priorities clear, maintaining alliances, showing respect for allies, using american power to provide for the common defense and to stand up to those nations whose strategic interest are in tension with america's. retired four-star general suggested his views were not aligned with the president. to help make sense of all of this i want to bring in richard haass. haas was director of policy planning in the state department under george w. bush, he is the president on the council of foreign relations and the author of "a world in disarray." richard, let's first talk about the process here because my suspicion is that james mattis