They made a few amendments after the original was published. It could be he is referring to the second of such measures, although I am frequently confused. You might see if there is anything in your pocket version about that.
Hmm...which amendment speaks to the ability of the federal government to require one state to honor the state issued permits from other states? What mechanism will he use to enact such a measure? Executive order? Legislation?
If he was arguing to push for the supreme court to overturn the constitutionality of carry permits period, then it would be a good thing but this, as it is advertised, is not a pro 2nd amendment or pro constitution position.