Letter to Acting SEC Chairman Piwowar on the Congo Conflict Minerals Rule, February 23, 2017
Letter to Acting National Security Advisor Kellogg on Congo Conflict Minerals Act, February 14, 2017
Letters to Secretary Kerry on Appointment of U.S. Special Representative, October 7, 2013
Letter to SEC on Proposed Conflict Minerals Rules and the Democratic Republic of the Congo, February 8, 2011
Letter to Senators Brownback and Feingold on the Democratic Republic of the Congo, November 25, 2008
Letter to Congress on the Conflict Minerals Trade Act and the Democratic Republic of the Congo, December 17, 2009
Letter to Congress on the Conflict Minerals Act and the Democratic Republic of the Congo, February 19, 2010
Letter to Congress on the Conflict Minerals Trade Act and on the Democratic Republic of the Congo, January 6, 2010