As Josh Marshall says, just watch the video.
And this, from Huffington Post:
"We don't have people that become ill, who die in their apartment because they don't have insurance," Romney said in an interview with the Columbus Dispatch's editorial board on Wednesday.
While it's difficult to tell how many people die each year from lack of health insurance, one study, from a health care advocacy group, puts the number at 26,000 deaths per year.