If you think that his position on healthcare changes the likelihood that he will discharge that weapon, is this a rational belief?
Megan McArdle writes sensibly about open carry at protests, ultimately deciding that the practice is wrongheaded albeit harmless.
On the same topic, it turns out that the AR-15 was part of an Ernie Hancock publicity stunt. (Hancock is the paleocon who runs Freedom's Phoenix. Hat tip on this one goes to Mike Ross.) No demonstration like this is not centrally organized--it turns out that the Left has actually been paying people to work the demonstrations!--but to reveal such an act as "staged" is to snatch defeat from the jaws of victory.