Article IV § 2
The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.
This clause, along with section two of Article VI and section one of 14A, basically places state law under the umbrella of the Constitution and its amendments. To suggest that state law should, based on a strict
verbatim et literatim reading, not be required to pass constitutional muster is just downright silliness.
What way be even more troubling a subsequent line is Article IV,
No Person held to Service or Labor in one State, under the Laws thereof, escaping into another, shall, in Consequence of any Law or regulation therein, be discharged from such service or Labor, but shall be delivered up on Claim of the Party to whom such Service or Labor may be due.
which is, yes, where slavery was literally enshrined in the Constitution, but "held to service" could in theory become warped into serving the country by bearing its children. A state could claim that, by law, it holds its pregnant women to service, as is protected under Article IV and cannot be terminated in another state. Which is the paranoid, dystopian,
Handmaid's Tale outlook – but we already have a Supreme Court justice straight out of that book, and there is no way to guess what limits there might be on their insanity.