A demonstrator holds a placard reading "You are not my president" during a protest in front of the National assembly building in Belgrade on April 4, 2017. Thousands of mostly young people joined protests on April 4, 2017 for a second consecutive night in several Serbian cities against Prime Minister Aleksandar Vucic being elected the country's next president. / AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images)
Protesters hold a banner reading "Down with the dictator" during a protest in front of the National Assembly building in Belgrade on April 5, 2017. Thousands of mostly young people protested for the third consecutive night in several Serbian cities against outgoing Prime Minister Aleksandar Vucic's weekend election for country's next president. / AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images)
A protester waves the Serbian flag during a protest in front of the Government building in Belgrade on April 5, 2017. Thousands of mostly young people protested for the third consecutive night in several Serbian cities against outgoing Prime Minister Aleksandar Vucic's weekend election for country's next president. / AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images)
Demonstrators wave a Serbian flag during a protest in front of the National Assembly in Belgrade on April 4, 2017. Thousands of mostly young people joined protests on April 4, 2017 for a second consecutive night in several Serbian cities against Prime Minister Aleksandar Vucic being elected the country's next president. / AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images)
Demonstrators holding Serbian flags and banners take part in a protest in central Belgrade on April 4, 2017. Thousands of mostly young people joined protests on April 4, 2017 for a second consecutive night in several Serbian cities against Prime Minister Aleksandar Vucic being elected the country's next president. / AFP PHOTO / ANDREJ ISAKOVIC (Photo credit should read ANDREJ ISAKOVIC/AFP/Getty Images)
