At least this is the position Todd Kim, the Washington DC solicitor general is taking on their interpretation of the Second Amendment in the ongoing Parker case.  They are currently appealing the 2004 decision where a lower level DC judge said DC residents do not have a constitutional right to keep and bear arms.  This case is particularly interesting because no state jurisdiction over DC law so the suit will directly define the rights protected by the Second Amendment.  If they win, DC citizens will once again be able to enjoy the RKBA.  Either way, if the SCOTUS agrees to hear any appeal on the matter, it could potentially settle the issue once and for all.