Then the mayor of Seattle to do this? (Prohibition of firearms)?

http://blog.oregonlive.com/nwheadlines/2008/06/seattle_mayor_moves_quickly_to.html

A nothing to do with the 2nd amendment. Only prohibits the ownership of the city that prohibits weapons in Seattle. DC bans throughout the city not maintained.

Bob Warden Files Lawsuit Over Seattle’s Gun Ban.wmv