Isn't the difference here that Federal courts can't create law, only rule on constitutional matters. Common law (state and local courts) can create "laws".
There are some exceptions to this where federal laws have likely overreached the framers intentions, and then federal courts had to rule on a matter pertaining to that law.
There are some exceptions to this where federal laws have likely overreached the framers intentions, and then federal courts had to rule on a matter pertaining to that law.