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Advancing to the runoff, Massa of the ruling centre-left Union for the Homeland unexpectedly came in first place, winning 36% of the vote, against Milei of the right-wing Liberty Advances, who came in second place, with 30% of the vote. Massa's victory in the first round was seen as an upset because of the severe inflation that took place during Massa's tenure as Minister of Economy, as well as Milei's lead in polls up to that point.[5]
In the runoff Milei defeated Massa with 55.7% of the vote, the highest percentage of the vote since Argentina's transition to democracy. Milei received over 14 million votes, which was the highest ever vote total in Argentina's history. In a surprise reversal of the first round, Milei outperformed polls, which had been calling for a much closer race. Massa conceded defeat shortly before the official results were published.[6][7] Milei would later be sworn in as President of Argentina on 10 December 2023.[8][9][10]
The election has been called a notable example of a center squeeze, with the left-Peronist bloc accused of spoiling the election for the moderate Together for Change block, which some polling showed would have defeated Milei in the runoff.[citation needed]