buenos air argentine president mauricio macri main bulwark comeback populist predecessor cristina fernandez october legislative elections someone whose name even ballot buenos air governor maria eugenia vidal hand role ensure macri let change coalition win vote list candidates head fernandez run senate seat argentina most-populous province argentina electoral list system guarantee fernandez get one three senate seat grab oct. 22 vote really play election whether get enough support pose serious challenge 2019 presidential election macri expect run second term election electoral power cristina ability make comeback legislative power say julio burdman head local poll firm observatorio electoral refer midterm vote vidal like captain america create super-soldier macri win war cristina add opinion poll release tuesday firm show vidal 44 popular macri hold key keep fernandez bay buenos air home 40 percent argentine voters province gateway presidency billions dollars potential investment future latin america economy hang balance investors eye argentina vast oil mineral wealth want macri coalition block chance political nemesis fernandez return presidency 2019. hope turn page free-spending populist governments rule argentina on-and-off seven decades since days juan evita peron macri scion wealthy business family positive image 44.2 percent poll buenos air province fernandez trail 35.1 percent accord observatorio electoral survey vidal however comfortably best 49.8 percent even though fernandez love millions poor argentines generous social spend critics say growth-at-all-costs policies stoke inflation distort economy heavy currency control 2007-2015 administrations investors argentina 550 billion economy therefore focus many vote fernandez list congressional candidates get versus macri coalition vidal former welfare administrator know common touch work families become political juggernaut macri need deflect fallout unpopular subsidy cut fiscal tighten measure 38.2 percent respondents observatorio electoral poll say plan vote list head macri ally esteban bullrich little-known former education minister make series gaffes early campaign accompany vidal rally fernandez list trail 35.8 percent opinion poll difference within survey 3.2-point margin error 7.1 percent voters still undecided friday still anybody race vidal walk province ring doorbells take airwaves campaign fernandez poll weekend consultancy elypsis show vidal argentina popular politician especially strong poor heavily populate buenos air suburbs traditional base fernandez support macri remain relatively unpopular argentina peso currency bond stock market fear return profit-killing economic distortions fernandez years recoil june announce would run senate vidal job make sure fernandez support grow beyond 34 percent get last month primary vote beat bullrich less percentage point poll generally show gain since fernandez refuse discuss vidal governor become macri camp vocal critic fernandez chide pay attention struggle residents province run represent senate vidal critics say creation media regularly cover neighborhood visit town-hall meet direct exchange vidal fernandez come former president allege free cafeterias poor children close reprisal measure school teachers province go strike good pay like tell cristina fernandez know use lie campaign vidal say ask leave children go keep eat strike strike argentina 's macri deploy popular governor fernandez