This would make the United States Senate the first government to "officially recognize the situation as a genocide."[246] Senators Cornyn, Merkley, Cardin, and Rubio signed a letter to request Mike Pompeo-the Secretary of State- issuing a genocide determination. National Review reports that "U.S. government genocide determinations are an incredibly tricky thing. They require solid evidence to meet the criteria set out under the 1948 Genocide Convention."