Supreme Court ruled Commerce Clause of Constitution DOES NOT permit Medicare for ALL. National Federation of Independent Business v. Sebelius, 2012. This SCOTUS case says that the federal government cannot force anyone to buy a product or use a service; if they have inactivity.
Raising taxes or mandating a Tax in a law, is completely different from forcing Americans to buy a service or product. Obamacare was a TAX. Supreme Court declared Obamacare a Tax. The Tax can be enforced or modified but it is NOW set to ZERO, per Tax Cuts & Jobs Act, 2017. 
Texas judge on Friday (who struck down Obamacare) reiterated what Chief Justice Roberts said; which was economists who argue against inactivity does not pass the Commerce Clause test. SCOTUS said regulating activity is completely different from forcing someone to become active.
