It is debate night. ten democratic presidential hopefuls facing off on msnbc. among them, entrepreneur andrew yang, who speaks to our harry smith about the soaring cost of health care in "what matters. >> reporter: at this new hampshire home, all-in for andrew yang we showed the tech entrepreneur what these democratic voters told us over and over. >> our deductible is still $10,000. >> reporter: they're worried about health care >> i have this pain in my back. i'm thinking i only have so much money to take care of my kids i work three jobs. i work more than 40 hours a week, and i still don't h...