Serbian longtime leader Aleksandar Vucic conceded defeat in a snap vote, handing victory to a student-led movement that built mass support by pledging to fight graft and reverse democratic backsliding.The Student List won 53 percent of the vote, according to nearly complete results released yesterda. Add TT as Preferred Source Serbian longtime leader Aleksandar Vucic conceded defeat in a snap vote, handing victory to a student-led movement that built mass support by.