As to the smell test, raging gunfights along the US border would fit nicely to the rationale for the proposed UN Small Arms Treaty, which Obama, Hillary and cadre find tasty.
There are so many announced agendas served by enhancing the nightmare down south and blaming it on US gun laws (har!) and drugs, while the public rationale of tracking to bad guys is so pathetic, incompetence fails as an excuse. The scale of the op also kills the "rogue agent" meme.
There isn't a way Obama, Holder and Clinton didn't know, or that ATF did this on their own. Can't get there from here.
Loyalty to petrified opinions never yet broke a chain or freed a human soul in this world — and never will.
— Mark Twain