If the claim is that 50 million are uninsured, or under insured, and there's 300 million in America than that would mean that 250 million have adequate insurance. That was just using logic based on the numbers spouted from the media and liberals. If you want factual data, and I doubt you do since it tears the claims apart, than a little research is all you need.
Of course according to one report that used 2010
Census data, that number is not accurate, the real number is more like 46 million people, 10 million of whom are not US citizens, so more like 36 million Americans are not, or under insured. Also it appears that 17 million of those 36 million make more than $50K, and over half of those make more than $75K, this lead the
National Bureau of Economic Research (just one of several papers) to determine that 25-75% of those that do not have coverage could afford it.