The US already has universal healthcare. That's what Obamacare did. You either were forced to purchase, forced to get it for free from taxpayers, or were lucky to only have your insurance rates go up by 33 percent.
Technically ours is better because it's universal AND free market.
Oh let's also not forget to consider demographics... Sure a universal system works well in a country with HALF the population of OHIO. Norway literally is out populated by the United States 70/1. We have 70 citizens for every single 1 of their citizens.
They have 4 doctors to every 1000 citizens, with around 100 Hospitals. Norway was also amongst the wealthiest nations in the world for quite a long time. According to many studies there is a direct correlation between wealth and health. Meaning those with more money have to use medical facilities and services less often than those who aren't rich.
https://militaryfamilieslearningnetwork.org/2019/08/08/correlations-between-health-and-wealth/#:~:text=Studies%20have%20shown%20a%20positive,those%20in%20lower%20income%20groups.
Statistically speaking - in 2017, only 0.05% of Norway was impoverished. Meaning just under 25,000 Norwanites were poor. Meaning 99.5% of them statistically live healthier lives.
Compare that against JUST Ohio - where we have 245 Hospitals. Where we also have 13.1% of Ohio marked as impoverished. With 11 million citizens - that makes up 150,000 Ohioans poor. When you have a society that has 13.1 percent of the populace being poor - you cannot run a Universal Healthcare system in the same manner as an entire Country half the size of Ohio - that has 125 thousand less impoverished people.
In Norway - their taxes from being rich - makes it possible. In the United States, too many impoverished people make it impossible.