[Psalm 73]

"The rights of the state do not supercede the US Constitution."
10th Amendment.:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

This is semantics. The states cannot make laws that run contrary to those in the Constitution.
They cannot make treaties with other nations, cannot mint thier own currency, etc.
They cannot allow the owning of slaves, and must be allowed defend the (Constitutional) rights of the very young (pre-birth babies).