FOX NEWS -- Argentine President Javier Milei secured a decisive victory Sunday in midterm elections, expanding his control of Congress and giving his government fresh momentum to push forward with deep spending cuts and sweeping free-market reforms.

The result gives Milei’s libertarian movement a boost and marks another sharp turn for one of Latin America’s largest and most volatile economies.

Milei’s party, La Libertad Avanza, won about 41.5% of the vote in Buenos Aires province, a historic upset in a region long dominated by the Peronist opposition. The rival coalition took 40.8%, according to figures cited by Reuters and The Associated Press.