Uhrm, its a request for you to provide substantiation for
your argument. You said something was objectively legally true, but can't cite the law.
From the horse's mouth:
"State courts are the final arbiters of state laws and constitutions.
Their interpretation of federal law or the U.S. Constitution may be appealed to the U.S. Supreme Court.
The Supreme Court may choose to hear or not to hear such cases."
Underlining mine.
Again:
"Unless the federal courts possess exclusive jurisdiction over a matter,
state courts may hear cases over which federal courts would have also had jurisdiction."
"the Supreme Court has ruled that
state courts generally must hear federal law claims unless state law bars a state court from hearing a federal claim through a neutral rule of judicial administration that does not improperly burden claims arising under federal law"
"The Court thus held [in Claflin v Houseman] that the
State courts have concurrent jurisdiction [on federal claims] whenever, by their own constitution, they are competent to take it."
Claflin v Houseman itself:
"When we consider the structure and true relations of the federal and state governments,
there is really no just foundation for excluding the state courts from all such jurisdiction."