The below is attributable to Spokesperson Heather Nauert.
On May 18, Secretary Pompeo called African Union Chairperson Moussa Faki Mahamat to reaffirm the strong partnership between the United States and the African Union. They discussed our mutual interest in advancing peace and security, good governance, and human rights across the continent. They also discussed the need to continue our cooperation on diplomatic efforts, including urgently working to end the conflict in South Sudan and engaging on election preparations in the Democratic Republic of the Congo.
Source: U.S. Department of State