[Jim Noble]

A federal law that says concealed carry must be recognized by all states can at some future date be replaced by a law saying concealed carry cannot be recognized across state lines. That’s why concealed carry is, and must be, a state issue and any such law passed by Congress should be overturned on 10th Amendment grounds

+1

[katana]

Article Four, Section One of the U.S. Constitution:

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.

If judges and justices followed the Constitution this would be fait accompli and legislation would be unnecessary.