Tens of thousands of Argentines have jammed streets in the capital and other cities to show support for conservative President Mauricio Macri, who is facing a tough fight heading into general elections in October in a country beset with economic struggles.

Chanting "We can be better" and "Let's go together," a crowd that greatly exceeded expectations swelled outside the presidential palace in Buenos Aires just two weeks after a left-leaning presidential ticket turned in a far stronger showing than Macri's slate in political party primary voting.

An emotional Macri emerged on a balcony of the Casa Rosada to acknowledge his supporters, who responded to calls on social media to get out in the streets.

Supporters of Argentina President Mauricio Macri march to Plaza de Mayo in Buenos Aires, Argentina, Saturday, Aug. 24, 2019. Following a social media campaign large numbers of people gathered in the center of Buenos Aires to show their support for Macri's administration. (AP PhotoNatacha Pisarenko)

Supporters of Argentina President Mauricio Macri march to Plaza de Mayo in Buenos Aires, Argentina, Saturday, Aug. 24, 2019. Following a social media campaign large numbers of people gathered in the center of Buenos Aires to show their support for Macri's administration. (AP PhotoNatacha Pisarenko)