▁nomin ating ▁Das ▁Ne ves ▁as ▁his ▁running ▁mate . ▁Rodríguez ▁Sa á , ▁in ▁turn , ▁nominated ▁former ▁Santa ▁Fe ▁Governor ▁José ▁María ▁Vern et ▁as ▁his ▁running ▁mate ▁on ▁his ▁Federal ▁Comm it ment ▁ticket . ▁Sol á , ▁who ▁strugg led ▁in ▁the ▁pol ls , ▁with d rew ▁on ▁ 1 1 ▁June , ▁encourag ing ▁local ▁candidates ▁in ▁his ▁fol d ▁to ▁form ▁al li ances ▁with ▁Du hal de ▁and ▁the ▁party ' s ▁candidate ▁for ▁Buenos ▁Aires ▁Governor , ▁Francisco ▁de ▁Nar vá ez . ▁De ▁Nar vá ez ▁later ▁end ors ed ▁Rodríguez ▁Sa á . ▁ ▁Support ▁for ▁Du hal de ▁was ▁strong est ▁among ▁the ▁working ▁class ▁( 1 4 . 2 %) ▁and ▁weak est ▁among ▁young ▁vot ers ▁( 3 . 9 %). ▁Rodríguez ▁Sa á ▁pol led ▁best ▁among ▁upper ▁middle ▁class ▁vot ers ▁( 1 4 %) ▁and ▁those ▁age ▁ 3 0 ▁to ▁ 4 4 ▁( 1 1 . 9 % ); ▁worst ▁among ▁the ▁poor . ▁ ▁Rad ical ▁C iv ic ▁Union ▁ ▁The ▁center - left ▁Rad ical ▁C iv ic ▁Union ▁had ▁scheduled ▁prim aries ▁for ▁ 2 8 ▁April . ▁Both ▁Ric ardo ▁Alf ons ín , ▁son ▁of ▁the ▁late ▁former ▁President ▁Ra úl ▁Alf ons ín , ▁and ▁current ▁party ▁leader ▁Ern esto ▁San z ▁started ▁pre - c andid acy ▁campaign s ; ▁San z , ▁however , ▁dropped ▁out ▁on ▁ 2 8 ▁April . ▁Vice ▁President ▁Jul