santiago center-left lawmakers chile pledge wednesday unify support single candidate eventual runoff conservative candidate sebastian pinera lead poll year presidential race pinera consolidate support among country political right six left-of-center candidates compete nov. 19 first round vote amid fissure within socialist president michelle bachelet coalition emergence new left-wing leaders poll show pinera wealthy businessman previously govern chile 2010 2014 around 40 percent voter intentions would enough win absolute majority first round december runoff expect close mean leave ability unite around single candidate could critical first round us give best effort candidate support promise second round support candidate represent force leave center-left 300 politicians say wednesday letter senator alejandro guillier ally bachelet poll second previously say would seek link progressive candidates ultimately defeat pinera bachelet constitutionally prohibit seek second consecutive term christian democrat party large centrist socially conservative party put forward candidate hesitant pledge unity date follow deep divisions govern nueva mayoria bloc elements bachelet policies recent months one party lawmakers say wednesday would support best-performing nueva mayoria candidate night 19th go get behind candidate move second round christian democrat congresswoman yasna provoste tell journalists wednesday chile 's divide center-left pledge unity presidential runoff