Congress has the power to set up and organize all below the supreme court.

The answer is federal courts.

The US judicial system is composed of three branches: the Supreme Court, Courts of Appeal and District Courts. Each branch has a certain purpose. For example, the district courts handle simple and state-related cases while the Court of Appeals is a court for appeals from cases that are not yet resolved. and lastly, the Supreme Court is the last resort if people wished to pursue a higher level of judiciary.

Americans are not interested in paying significantly higher income taxes to have ‘government-provided’ healthcare. National health insurance, or single payer, is a dream for many Americans, but if they actually comprehended what it will cost them, and the rest of the taxpayers, they may pause and reconsider.

https://www.politicususa.com/2016/02/10/why-americans-cant-have-universal-healthcare-like-europeans.html