Clayton Cramer by way of Blode
Apparently now there are over 5 Million active CCW permit holders in the US. That's a lot, and as Blode points out, it has been a very low-key exponential growth, like that of homeschoolers, a group I expect has a lot of overlap. With just one more doubling, this group can probably achieve the level of political clout that nobody will be inclined to mess with them.
I suppose most of you have noticed that no mass murder in recent history has been carried out in a place where ordinary people can carry concealed weapons. I'd argue that this in no coincidence or accident.