Tens of thousands of Armenian opposition supporters rallied on Friday for an eighth consecutive day against the appointment of ex-president Serzh Sarksyan as the new prime minister and demanded an early parliamentary election. Under a revised constitution approved by referendum in 2015, the prime minister now has most power in Armenia while the presidency has become largely ceremonial. A Sarksyan ally, Armen Sarkissan, was sworn in as president last week after being elected by the parliament.