A man pushes a cart with a megaphone playing Islamic verses in the street of Maiduguri in north-east Nigeria on July 5, 2017.

In July, President Donald Trump walked out of a working session on Africa at the Group of 20 summit in Hamburg.

In April, Secretary of State Rex Tillerson invited African Union chief Moussa Faki to Washington, and then backed out of the meeting at the last minute. And in March, the administration released a budget blueprint that one analyst says would "slash and burn" development programs in African nations.