There is a theory that when he was assassinated, Lincoln was already dying from natural afflictions like cancer or Marfan syndrome and so forth. Evidence used to back that are Lincoln's haggard and aged appearance shortly before he died. Traditionally, this had been said to be from the weight and melancholy of the war, but the disease theory says it is actually from and is symptoms of illness. For this discussion, let's assume that is true.
What if Lincoln, rather than being assassinated, died a short time after his OTL assassination took place?
What if Lincoln, rather than being assassinated, died a short time after his OTL assassination took place?