▁by ▁sen ators ▁Claud ia ▁López ▁Hern ández ▁and ▁Ang é lica ▁L oz ano ▁Cor rea ▁of ▁the ▁Green ▁Alliance ▁party . ▁Under ▁the ▁constitution , ▁a ▁refer endum ▁can ▁be ▁called ▁if ▁ 5 % ▁of ▁registered ▁vot ers ▁sign ▁a ▁pet ition ▁in ▁favour . ▁Between ▁ 2 4 ▁January ▁and ▁ 2 6 ▁July ▁ 2 0 1 7 ▁a ▁total ▁of ▁ 4 , 2 3 6 , 6 8 2 ▁sign atures ▁were ▁collected , ▁with ▁ 3 , 0 9 2 , 2 3 8 ▁recogn ised ▁as ▁valid ▁by ▁the ▁National ▁Civil ▁Reg istry , ▁above ▁the ▁ 5 % ▁threshold ▁( 1 , 7 6 2 , 0 8 3 ). ▁The ▁Senate ▁approved ▁the ▁refer endum ▁on ▁ 5 ▁June ▁ 2 0 1 8 ▁by ▁a ▁vote ▁of ▁ 8 4 – 0 , ▁with ▁President ▁Juan ▁Manuel ▁Santos ▁signing ▁dec ree ▁ 1 0 2 8 / 2 0 1 8 ▁on ▁ 1 8 ▁June ▁for ▁the ▁holding ▁of ▁the ▁refer endum . ▁ ▁Camp aign ▁Many ▁polit icians ▁supported ▁" Yes " ▁in ▁the ▁refer endum , ▁and ▁a ▁par ody ▁music ▁video ▁in ▁the ▁style ▁of ▁reg ga eton ▁was ▁widely ▁shared ▁on ▁the ▁country ' s ▁social ▁media ▁before ▁the ▁vote , ▁using ▁cli ps ▁of ▁these ▁polit icians . ▁The ▁President , ▁I ván ▁Du que , ▁supported ▁the ▁refer endum , ▁though ▁his ▁ment or ▁Al var o ▁Uri be ▁did ▁not , ▁saying ▁he