I can see a lot of sense in the argument that having a firearm makes a little grandmother equal to several thugs’ intent on robbing her. So should be a deterrent that protects the ordinary person against bad people.
		
		
	 
That example is actually from a real occurrence: a grandmother in a wheelchair was assaulted in a city park by night; she gave them everything they asked for, but they were angry because it wasn't as much as they'd hoped, so they tipped over her wheelchair and began kicking.
They hadn't reckoned that a frail wheelchair-bound white-haired lady would have a miniature six-shooter and know how to use it.
Ever since weeing that news report, I've wondered how she felt about lying there with three corpses until someone found her.
	
		
	
	
		
		
			However the constitutional statement that "The right of the people to keep and bear arms shall not be infringed" was made at a time when “arms” were fairly basic. In contrast - in Japan at that time the law was that only Samurai could bear swords.
In fact the capability of “arms” has expanded almost exponentially in the last 200 years. Whereas “arms” then meant muskets or cannons – now these are a lot more capable.
		
		
	 
The Samurai are an excellent example of the other side of the picture, when those with wealth, time, and training could be more powerful than anyone else, and thus have their way.
	
		
	
	
		
		
			Does the Grandmother being robbed need an automatic weapon? Maybe an RPG would come in handy? What about a cruise missile (which is just another type of “arm” – as is a nuclear bomb).
		
		
	 
There's a common understanding of the time that's necessary here, just like the common understanding of the word "militia" for the introductory clause.  When arms for "the people" were spoken of, it was governed by the "regulated" (organized) concept of militia:  individuals had individual arms, groups had group arms.  So while technically a cannon is an "arm", it doesn't count under what "the people" can bear; it's a crew-served weapon.  Crew-served weapons could be "kept" by the people, but in a location where the crew to serve them would maintain them.
So in common parlance, "to keep and bear arms" referred, on a personal level, to personal arms.  
If (the) people organize a militia, then as a group they could properly "keep" crew-served weapons, for the defense of their communities -- but one of the marks of a proper militia, contrary to those who have their own and defy the government, is that it will be available to the call of the government for keeping order.  Indeed, a posse -- a group of men called up by law enforcement for the apprehension of particular outlaws -- is a form of the militia in action.
The real distinction in weaponry between the time of the Revolution and now is that of offensive and defensive weapons.  I can't think of any weapon back then which was purely offensive or purely defensive, but we certainly have them now.  Missiles for striking immediate targets which are threatening you can be considered defensive, but long-range missiles, especially with nuclear warheads, are almost purely offensive.
It is not unreasonable to argue that the Second Amendment did not mean to include purely offensive weapons.  Thus cruise missiles are probably out, but SAMs are in; bombers are probably out, but fighters might be in.  But for purely personal weapons, as for grandma, what's covered is what one would normally expect to need for the expected situation -- so unless she expects thugs to come upon her in an armored vehicle, an RPG would not be proper.
	
		
	
	
		
		
			In other words the rights of ordinary US citizens to bear arms is already severely infringed. Again the legal position is probably not a good guide to the real position. At the time the US constitution was framed no one conceived of the fact that all you would need today to make a very powerful bomb is a ton of fertilizer – so any farmer in the USA could become a Timothy McVeigh if they wanted to.
So the “right of the people to keep and bear arms” in the USA today should probably be infringed to permit these to be only of specific types and only be useful for specific purposes. In the case of the Grandmother being robbed – this would indicate that the most appropriate weapon would be a semi-automatic “sawn-off” shotgun. Which would need only minimal aiming and allow for a very high rate of fire (in contrast – a revolver must be aimed and has a slow rate of fire).
The clear implication is that the “right of the people to keep and bear arms” should be – and actually is - very much infringed.
		
		
	 
The right is infringed only where there are gun bans, registrations, fees, restrictions, and other barriers to obtaining ordinary personal weapons.
And actually, grandma would have a hard time bearing and using a sawn-off shotgun; they are hard to conceal, and somewhat difficult to bring into play.  That would be an appropriate weapon for a small business in a high-crime area, though.  For an ordinary citizen, the best weapon for self-defense is usually a medium-caliber handgun -- whether semi-auto or revolver depends on the individual's hand strength more than anything.
But there should be no infringement as to weapon type; what type works best for one person will not be the best for the next.  Inherent in human dignity is the right to arm oneself as one chooses, as well, so infringement by banning some types and approving others is immoral, anyway.
	
		
	
	
		
		
			As to the comparison of Barrack Obama with Jimmy Carter - I think both have a similar view on guns - in that neither will seek to alienate the "Gun Lobby" but won't oppose any move congress makes.
		
		
	 
So in other words they're spineless.
... BIG recommendation against Obama!
	
		
	
	
		
		
			One strength of the US system is that the "Gun","Gay" and "Jewish" lobbies all have similar electoral support (about 4% each) - who are fairly evenly divided on political lines - but who's vote will swing violently against those that threaten their  core interests.
		
		
	 
Don't forget the Pink Pistols and the JPFO.