U.S. President Barack Obama addresses the Congressional Black Caucus Foundation's 46th annual Legislative Conference Phoenix Awards Dinner in Washington, September 17, 2016. REUTERS/Yuri Gripas

U.S. President Barack Obama addresses the Congressional Black Caucus Foundation’s 46th annual Legislative Conference Phoenix Awards Dinner in Washington, September 17, 2016. REUTERS/Yuri Gripas

U.S. President Barack Obama addresses the Congressional Black Caucus Foundation's 46th annual Legislative Conference Phoenix Awards Dinner in Washington, September 17, 2016. REUTERS/Yuri Gripas

September 19, 2016 11:16 PM (UTC+8)