BUENOS AIRES — Argentines woke up to a politically emboldened President Javier Milei after a dramatic victory in mid- term elections on Sunday.

The libertarian president and staunch Donald Trump ally secured more than 40% of the popular vote, and solidified his hold on power in the National Congress, where he had previously struggled to push parts of his agenda through.

The scope of the victory surprised even Milei. His La Libertad Avanza party earned roughly 9 points more than the left-leaning Peronist opposition, and also eked out a victory in the powerful province of Buenos Aires, where Peronists usually dominate. Just over one month ago, the president's party had lost badly in legislative elections in the province of Buenos Aires.

But the story Sunday was very different, and sent

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