http://www.politico.com/magazine/sto...6856_full.html

I thought these parts were particularly interesting:

In 1959, according to a Gallup poll, 60 percent of Americans favored banning handguns; that dropped to 41 percent by 1975 and 24 percent in 2012. By early 2008, according to Gallup, 73 percent of Americans believed the Second Amendment “guaranteed the rights of Americans to own guns” outside the militia.
Cue the National Rifle Association. We all know of the organization’s considerable power over the ballot box and legislation. Bill Clinton groused in 1994 after the Democrats lost their congressional majority, “The NRA is the reason the Republicans control the House.” Just last year, it managed to foster a successful filibuster of even a modest background-check proposal in the U.S. Senate, despite 90 percent public approval of the measure.