Well, we’ll know in the very foreseeable future if Trump’s Supreme Court picks were worth all that political capital that was expended to put them on the court. If the Court can make all states accept the homosexual marriage licenses issued in VT, CA and NY, then the Court can - and SHOULD - make all states accept gun licenses - even those that are essentially pro forma and/or Constitutional - from each other on the same principle.
But, don’t hold your breath. That’s not going to happen because the Chamber of Commerce doesn’t care about your 2nd Amendment rights and they’re the ones who picked those three Justices.
> Trump’s Supreme Court picks
Hell with them. States need to assert their actual standing under the US Constitution as written, as of now.