> What is needed is for licensed holders to be able to travel interstate without committing a crime. <
It would seem that the first sentence of Article IV, Section 1 of the US Constitution applies.
Full Faith and Credit shall be given in each State to the public Acts, Records, and judicial Proceedings of every other State. And the Congress may by general Laws prescribe the Manner in which such Acts, Records and Proceedings shall be proved, and the Effect thereof.
Quoting the constitution proves you know nothing about the law.
You have to cite controlling Supreme Court opinions.