Then...
"Therefore, once a large number of Mexican firearms were being traced back to the US..."
Gee, do you see the fallacy of any argument you may come up with?
Once you make conflicting statements, you veracity is suspect.
I learned that on TV.
It is not my argument, but Obama/Holder/Calderon's argument.
You see, while the Mexican and US Governments will say that thousands of firearms discovered in Mexico were traced back to the US, those same governments would never reveal the actual serial numbers of those firearms for independent verification.
Therefore, both the Mexican and US governments could claim that the "traced" firearms had nothing in common with the "few" firearms that dealers were forced to sell. The governments would claim that those "few" firearms allowed those governments to uncover a bigger gun-running scheme.
Obama/Holder/Calderon would have their proof needed to call for more gun control.
The MSM would never question the veracity of the government claim.
You and I would know it was a setup, but nobody could prove it.
It was the death of a US Border Agent, Brian Terry, that caused some to start breaking the silence. Had it not been for that unfortunate death, this may have worked for the liberals.