I remember the exercises in high school economics class of the macro-economic question of guns vs. butter.
Bawb expands this discussion with his own version of this theme: Mexican gun runners or holsteins, except in our present quasi-reality of Washington, DC, the idea of keeping guns from entering the US illegally isn't as important as pushing dairy farmers around or wasting money on an under-used border station in Vermont.
Because we all know that more illegals enter the country from Canada than from Mexico. That's got to be true because of all the English as Second Language students speaking French as their primary language.
Got back bacon, eh?