The election of Mauricio Macri marks the end of 12 years of Kirchner rule in Argentina.
Opposition candidate Macri won the country’s runoff election, ending the era of left-leaning Peronist President Cristina Fernández de Kirchner, who along with her late husband dominated the political scene and rewrote the country’s social contract.
Macri won the elections with 51.4 percent of the vote.
Argentina has had a more left-facing government since 1983, after the end of military rule across the country.
Ruling party candidate Daniel Scioli, Fernandez’s chosen successor, called Macri to congratulate him.
Macri, the mayor of Buenos Aires, ran on promises to overhaul the South American nation’s sagging economy. His win comes after he did better than expected in the first round on October 25, forcing a runoff with Scioli, the governor of the vast Buenos Aires province.
A move to more right-wing politics could affect the country’s relations with Latin American contemporaries Nicolás Maduro and Evo Morales, the BBC reports.