Quote: But I do agree that it is a living document designed so that laws can change with changing times, which means the "regulation" part regardless of a militia argument applies.
Actually the militia system was abolished in a series of laws beginning in 1903. What happened of course was that the Spanish-American War had shown the shortcomings of the militia system. The National Guard was created in its place with Congress determining the amount of training required for NG units.
So the "living document" killed the militia.