The Center for Strategic and International Studies (CSIS) published on 20 July 2018 a commentary titled "Blowing the Horn: How the United States Can Reclaim the Strategic Initiative in the Bab el Mandeb" by Alice Friend and Melissa Dalton, both at CSIS.
The commentary urges the United States to update its policy in the Horn of Africa to take into account all of the recent geopolitical changes involving the Gulf States, China, Ethiopia/Eritrea, and Turkey.