Argentina’s President Javier Milei’s libertarian party has won a big victory in national legislative elections, according to partial official results, giving his free-market reform drive fresh impetus after a financial market crisis threatened to derail it.

The vote is a key gauge of whether Argentines still back his cost-cutting, pro-market experiment, and whether he can govern effectively for the next two years.

Argentina voted Sunday in a midterm election that will serve as a crucial referendum on President Javier Milei’s ambitious austerity policies and, potentially, a $40 billion rescue package from the Trump administration.

Argentina's budget-slashing leader Javier Milei pulled off a stunning win in Sunday's midterm elections, boosting the flagging reform agenda of the US-backed right-winger.

Polls closed and vote counting began Sunday in Argentina's pivotal midterm elections, which will determine whether libertarian President Javier Milei can continue his polarizing campaign of downsizing the state.

The outcome of the elections could determine the future of Milei’s economic programme and a vital $40bn US bailout.

Argentina holds midterm elections Sunday that will determine whether President Javier Milei enters the second half of his term bolstered or diminished as economic troubles abound despite unprecedented US aid.

Argentines voted Sunday in legislative elections that will determine the future of President Javier Milei's reform agenda and likely trigger market turmoil if voters desert him, despite unprecedented US aid.