And this is political bull **** by the republican house of crooks.
Looks to me like a case of the best defense being a good offense.
Obama and Holder hoped to rape our Constitution with another ban on assault weapons. And they hoped to use the fallacy of "US-supplied assault weapons fueling the cartels" to justify it.
While it is true that with the NRA, Nancy Pelosi and the Supreme Court all teaming up to defend our Constitution, Obama and Holder have always had slim chances of getting their atrocity enacted into law, it is better yet to prevent them from trying in the first place.
By keeping the Obama administration on the defense on this issue these past years, the Republicans have prevented them from making any further attempts at an unconstitutional ban on assault weapons, and have rendered the fallacy of "US-supplied assault weapons fueling the cartels" completely inert as a political argument.