A coalition of environmental advocates has launched a letter writing campaign directed at government officials who intervened in a dispute between Renco Group and its Doe Run Peru subsidiary and the government of Peru. The campaign came after the Sunlight Foundation reported that Renco had hired eight former government officials in less than three months to lobby on its behalf.

Two members of Congress, House Financial Services chairman Spencer Bachus, R-Ala., and Rep. Donald Payne, D-N.J., wrote letters to executive branch officials summarizing Renco Group's position in the dispute with Lima. The letters request that the U.S ...