can make a statement that says at this juncture, we cannot support an administration's policy of this type. but i think it is absolutely the most salient line in the letter and basically says at this point, our views diverge so much that i cannot work with you at this juncture. >> david, put this in historical context of how significant a moment this is for donald trump. >> well, it's a significant moment for the world, erin. for over 70 years, stretching back to world war ii, democracies across the west have looked to the united states for leadership and for stability, providing stability, working through our partners to secure the peace, to allow economies to grow, to give people hope. jim mattis comes out of that tradition. he stands for those values. that's why people look to him as the man that if all else fails, you could look to him and say,