US Democrats Vie for 2020 Presidential Nomination

Senator Elizabeth Warren has become the latest US Democrat to declare for the 2020 race, which will pit contenders from the left of the party against more centrist candidates.

Also in the programme: US-backed Syrian-Kurdish forces begin the battle against Islamic State's last redoubt in Syria east of the Euphrates river; and humanitarian aid intended for Venezuela remains stuck on the Colombian side of the border as President Maduro insists Venezuelans are not "beggars".

(Photo: US Senator Elizabeth Warren. Credit: Getty Images)