Yes it did pass under Obama, and it's legitimate to blame him and especially Lynch for that bill. Holder had opposed previous versions and got them killed.
And it's a long article and I don't have time right now to find the quotes, but the law did two things. First, it changed the standard on stopping shipments because of a risk to public health to one that is impossible to meet in reality - imminent risk of death as I recall. Prior to that, DEA could determine that a store receiving 10 or 20 times normal of pain pills was being used as a distribution hub for illegal drugs, and shut off shipments to that location. As important, this tool was a club to hold over the heads of bad actors which incentivized them to stop the crap.
Second, before fines or other actions, the distributors have to be given the opportunity to fix problems first. Sounds fine, but if a distributor doesn't notice it's sending 10s of millions of pills into a county with a population of 20,000, FAR in excess of what can possibly be legitimately used in that county, they are DELIBERATELY ignorant, because being ignorant makes them $billions. They know damn well they're doing nothing more supplying drugs to corner dealers like a common drug lord, but they don't care and if caught want the ability, after the fact and after they've made their money, to do what they should be doing in the ordinary course of business.
Pro Publica ran an article detailing a lot of these problems with Oxycontin, and the execs there got reports weekly as I recall showing the shipments to regions and even stores, and the drug dealing locations were completely obvious, and they did nothing because they make $billions off drug addicts and drug addiction. It's fantastic for business.
