El presidente Calderon has again urged the US Congress to overhaul American immigration laws, insisting that both countries would benefit from reforms that recognize the "blood, sweat and tears" of migrant workers. Here's an idea, el presidente: enforce your northern border as you do your southern border. "Mexico doesn´t stop at its political border," Calderón said. "Wherever there´s a Mexican, there´s Mexico." Unwittingly, he illustrates the problem.