More than that, we are a federation of sovereign states, united for the limited purposes of common defense and one voice on foreign affairs.
Day-to-day governing of the People was to be left to the state Governors and legislatures. Interstate issues were to be addressed by the Congress, disputes were to be settled by the Supreme Court, and the overseer of the federation of states was to be the President.
Today, people believe that the President is the king who rules the people, and everything else is superfluous.
-PJ
Your post is a depressing reminder that our constitutional order has been nearly destroyed.
There never has been much state sovereignty under the constitution. The only time there was something approaching state sovereignty the Union almost collapsed because of it.
The role of the constitution is to establish a more perfect union. This implies a lot more than the union existing merely for defense and foreign affairs. There is a section within the document which forbids a wide range of state activities.
The real truth of the matter is that states have for over a century encouraged and assisted the fedgov to take more and more power. This means the 10th amendment has become almost meaningless.
Getting rid of the state appointed senators was a disastrously bad amendment and vastly increased the power of the fedgov.