believes the illnesses are the result of an isolated incident and aren't part of the multi-state outbreak of e. coli linked to chipotle restaurants which has restaurants that has sickened 52 people in nine states. the stock tumbled more than 25% in the last two months. up next, in the wake of donald trump's proposal to ban muslims from entering the united states, harsh lessons from the past of singling out entire populations. and developing now on capitol hill, we are awaiting president obama to commemorate remarks on the 13th amendment that outlawed slavery. when he begins speaking, we'll bring you his comments. we'll be right back. ♪ ♪