The new push for assault weapon ban

At the White House  Monday, the president pushed for reinstitution of a U.S. "assault weapons" ban.
But it wasn't the American president. It's was Mexico's as he blamed the U.S. for many of the firearms circulating illegally in his own country:

So a good deal of our discussion did touch upon this. But I recognize, at the same time, the administrative effort that's been undertaken, particularly by President Obama and his administration, so that the agencies for control of illegal actions curb this export of guns and weapons to Mexico. We’ve seen a much more active effort in this sense than in any other time in the past.

I have a great deal of respect for the U.S. legislation, especially the Second Amendment. But I know that if we don't stop the traffic of weapons into Mexico, also if we don't have mechanisms to forbid the sale of weapons, such as we had in the ‘90s, or for registry of guns, at least for assault weapons, then we are never going to be able to stop the violence in Mexico or stop a future turning of those guns upon the U.S.

Anyone else find it odd President Filipe Calderon of Mexico would thank President Obama personally for all the  U.S. has done to curb what weapons flow from our states to Mexico? Especially when thousands of weapons were moved south of the border under the watchful eyes of the U.S. Bureau of Alchohol, Tobacco, Firearms and Explosives while Mr. Obama sat in the White House?

For whatever reason,  Mr. Calderon appears to be a willing puppet for the Obama administration. He appears to be a surogate mouthpiece for what many suspect is an undeclared Obama agenda to eventually birth a new assault weapons ban that Mr. Obama himself is too weak-kneed to talk about except among sympathetic allies and, even then, only behind closed doors.