There was an op ed in the Washingtoin Post over the weekend pointing out how poorly thought out this bill was. It's academic now, but the authors laid out how the distinctions between who had to get a background check and who didnt were vague and could result in unforeseen criminla liability.
Just one example, you could lend your buddy a rifle to go hunting, no check required. However, if he violated some hunting law, say he shot a deer one day out of season, then the exemption wouldn't apply and one or both of you could be facing jail time.
In short, like all liberal anti gun laws, its main effect was to make potential criminals out of law abiding people, and for what? You know very wellif they had any proof that teh gun show "loophole", etc was a factor in violent crime, they would have inundated us with data. Instead, we got weepy parents accusing the NRA of wanting to kill children.
Ironically, the NRA was the only group that advanced any proposals that actually addressed the problem. Obam aand his crowd weren;t looking for solution showever. They wanted political scalps.
