So there is no Supreme Court case to cite?
Never said there was. I believe the question was whether or not a universal healthcare system run by the federal government was mandated, allowed, or forbidden by the US Constitution.
The 10th Amendment quite clearly states that powers not explicitly delegated to the Federal Government by the Constitution are reserved to the various States or to the people. Universal health care is not found as a power delegated to the Federal Government in any part of the US Constitution that I've read. Neither is public education.
It's the reason why damn near everything the Federal Goverment has done in the way of "Great Society" programs are claimed to be done in the name "facilitating interstate commerce." I can provide you with some SCOTUS decisions striking down other legislation that was enacted under the interstate commerce clause if you'd like. Since there is not a national healthcare program there is not likely to be any SCOTUS decisions on the topic.