GOP presidential hopeful Herman Cain is known for his friendly personality and his catchy 9-9-9 tax overhaul plan.  However, there's something you may not know about Cain: he nearly died. The former business executive survived stage 4 colon cancer that had spread to his liver.  Cain says that this was part of the reason he … Continue reading Dr. Gupta discusses Herman Cain's health, cancer survival