Mexico's two thousand-mile border with the United States is unarmed, but it remains the locus of sharp conflicts. Last October, House Speaker "Tip" O'Neill, bowing to pressure from the Hispanic Caucus, withdrew the Simpson- Mazzoli bill on immigration reform over White House objections that "it is in the best interests of all Americans to have the nation regain control of its borders." Jorge Bustamante, director of Mexico's Center for Border Studies, argues, however, that such a bill would "leave all migrant workers, whether documented or not, in a state of virtual slavery, since they will have no access to the courts to plead for justice."