Delegates take part in roll call at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 26, 2016. REUTERS/Rick Wilking.

Delegates take part in roll call at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 26, 2016. REUTERS/Rick Wilking.

Delegates take part in roll call at the Democratic National Convention in Philadelphia, Pennsylvania, U.S. July 26, 2016. REUTERS/Rick Wilking.

July 26, 2016 6:58 PM (UTC+8)