Do you have any proposals that could rectify this situation, especially directly along the border?
The biggest thing, from what I've seen (I'm not a small business owner) is relaxing some of the strange reasons the US has thrown up for limiting access to the US roads by Mexican trucks. It comes off to me as overt protectionism. For instance, despite NAFTA's provision for free movement of goods in trade, a Mexican company cannot deliver its goods directly to a city such as Albuquerque without using intermediaries or US trucks. This policy does not stop US-owned maquiladoras from engaging in their sweatshopping, but it does limit Mexican businesses from being able to freely sell across the border, which was, by the way, the whole effing point (for Mexico, anyway).
That a lot of Mexican goods are still sold in Albuquerque speaks to the cost benefits of allowing Mexican goods into the US.
(Personally, by the way, I'd like to pay less for my imported Mexican Coca-Colas. They taste infinitely better than the US-produced Cokes that use corn-subsidy-goo instead of pure sugar.)