The original research was published March 14, 2017, in Annals of Internal Medicine, http://annals.org/aim/article/2609289/survival-comparison-patients-cystic-fibrosis-canada-united-states-population-based (extended abstract available, but full text behind paywall).
Comment: DeathcareThis study shows one way to quantify loss of life caused by excluding the poor (and some others) from healthcare. Dozens or hundreds of other studies could be done.
That access to healthcare saves lives seems obvious. But at least one conservative used selected data to argue that Obamacare does not save many lives, https://www.nytimes.com/2017/03/29/opinion/is-obamacare-a-lifesaver.html - published well after the two articles linked above (which it does not mention).
Another big fight will be the Trump/Republican budget, proposing huge cuts to almost all Federal activities except war - including medical research. (In science, NASA is to be spared - but focused on Mars, apparently to distract attention from Earth, which some consider more important.)