plus, did kim jong-un execute one of his top negotiators over the failed summits with primp and sentence another one to hard labor in the u.s. is looking into it. and in the wake of two deadly 737 boeing max 8 jet crashes -- the president's threat to slap new tariffs on goods imported from mexico is also rattling wall street as we can see right now looking at the dow. it's down nearly 300 points at this moment in time, and the president says that he'll impose new tariffs if mexico doesn't stem the flow of migrants into the u.s. the tariffs would begin at 5% starting in june and then they would go up each month to 25% by october. our chief business correspondent christine romans has been following this, and she explains how new tariffs could affect the