Increasing violence perpetrated by drug trafficking organizations and other criminal groups is threatening citizen security and governance in Mexico. Escalating violence has increased U.S. concerns about stability in Mexico, a key political and economic ally, and about the possibility of violence spilling over into the United States. In recent years, U.S.-Mexican security cooperation has increased significantly, largely as a result of the development and implementation of the Mérida Initiative, a counterdrug and anticrime assistance package for Mexico and Central America that was first proposed in October 2007. This report looks at the funding and Congressional oversight for this Initiative.