Spain's government has formally accused Argentinian President Javier Milei of engaging in "disgraceful" election interference after he labeled Prime Minister Pedro Sanchez a dictator during an unofficial visit to Madrid.

The diplomatic dispute erupted on Wednesday, when Milei addressed an event in the Spanish capital. He declared that Spain suffers under the "disgraceful dictator Pedro Sanchez" and urged voters to remove the socialists from power, describing the country as the "cradle of liberalism."

The Spanish Foreign Ministry responded with a statement condemning the remarks as "insults and slander" aimed at the nation, its leader, and its population. The government emphasized that Spain is a sovereign state that rejects external interference and will not tolerate attacks on its democratically elected institutions. Officials stated that it is disgraceful for a head of state from a sister nation to visit with the sole aim of fostering polarization and violence between Spaniards and between the two countries.

The visit occurs at a sensitive time, with Spain preparing for a general election scheduled for Nov. 29. Sanchez, who has led the Spanish Socialist Workers' Party and served as prime minister since 2018, called for the early vote on Oct. 5 following a parliamentary rejection of housing reforms. Those reforms had been proposed in response to nationwide protests over Spain's housing crisis.

Current polling suggests that a right-wing coalition, consisting of the conservative People's Party and the far-right Vox party, is the most likely outcome of the Nov. 29 snap election. This political tension mirrors previous confrontations between Sanchez and Milei, an ally of U.S. President Donald Trump. In 2024, Madrid withdrew its ambassador from Buenos Aires for several months after Milei called Sanchez's wife "corrupt" and launched a series of personal attacks against the prime minister. Milei has continued to criticize Sanchez's government publicly in June 2025 and September 2026.

Milei faces his own political challenges ahead of a 2027 election, where he will seek to retain his position amid growing debt issues and a sluggish economy.

In response to Milei's comments, Sanchez posted a video to social media on Wednesday defending his political agenda. He stated that while some view left-wing labels as insults, he takes pride in being one. Sanchez listed specific policy positions he considers left-wing, including raising pensions, providing parents with more time to spend with their children, increasing the minimum wage annually, defending women's right to abortion, and opposing war in favor of peace.

The friction between Sanchez and Milei exists alongside broader tensions with Washington. Earlier this year, Sanchez clashed with Trump, who threatened to cut off trade and diplomatic relations with Spain after the two leaders exchanged criticisms regarding the U.S.-Iran war and defense spending.