Argentines are voting in midterm legislative elections on Sunday to determine support for President Javier Milei's free-market reforms and austerity measures.
The elections will decide half of the 127 seats in the lower Chamber of Deputies and 24 seats in the Senate.
Milei's La Libertad Avanza party, holding 37 deputies and six senators, seeks to expand its minority to advance his economic agenda.
The vote is seen as a referendum on Milei's policies, which have reduced monthly inflation from 12.8 percent before his inauguration to 2.1 percent last month and achieved a fiscal surplus through deregulation and spending cuts.
However, public frustration has grown over job losses, slashes to education, health, and pensions, and a corruption scandal involving his sister, the chief of staff.
Milei's approval has declined after provincial election losses.
A vote share above 35 percent could enable alliances to protect his vetoes and sustain investor confidence.
The results will influence a potential $40 billion U.S. bailout under President Donald Trump, including a $20 billion currency swap and possible $20 billion facility.
Trump has tied continued support to Milei's performance, stating if he does not win, the U.S. will withdraw.
"Don't give up because we're halfway there," Milei told supporters in Rosario on Thursday.
"We're on a good path."
Analysts anticipate a peso devaluation post-election, potentially sharper if Milei's party underperforms.
A cabinet reshuffle, possibly including centrist PRO party members, is expected, following the foreign minister's resignation.