Well, I'd say the line has really been crossed. If all true, the Mayor should be arrested by State troopers, or if necessary, Federal marshals.
You know, what could be really interesting here is a resulting class action that tests the Second amendment.
References from LA page at packing.org
Louisiana State Constitution Article I Sec 11
Right to Keep and Bear Arms
The right of each citizen to keep and bear arms shall not beabridged, but this provision shall not prevent the passage of lawsto prohibit the carrying of weapons concealed on the person.
State/local preemption law
Date updated: Aug 12, 2005 @ 9:10 pm
RS 40:1796
PART II-A. MISCELLANEOUS PROVISIONS
§1796. Preemption of state law
No governing authority of a political subdivision shall enact after July 15, 1985, any ordinance or regulation more restrictive than state law concerning in any way the sale, purchase, possession, ownership, transfer, transportation, license, or registration of firearms, ammunition, or components of firearms or ammunition; provided, however, that this Section shall not apply to the levy and collection of sales and use taxes, license fees and taxes and permit fees, nor shall it affect the authority of political subdivisions to prohibit the possession of a weapon or firearm in certain commercial establishments and public buildings.
Added by Acts 1985, No. 741,§ 1, eff. July 17, 1985.