Vice President-Elect JD Vance has warned the European Union that any further attempts at censoring social media will result in the U.S. completely defunding NATO.

This warning was made during an interview with podcaster Shawn Ryan, where Vance relayed an incident involving a top EU official who threatened Elon Musk for allowing former President Donald Trump back on the platform.

Infowars.com reports: Vance highlighted the stark contrast between European and American values, particularly on the issue of free speech. “The leader, I forget exactly which official it was within the European Union, but sent Elon this threatening letter that basically said, ‘We’re going to arrest you if you platform Donald Trump,’ who, by the way, is the likely next president of the United States,” he reported.

Vance is likely referring to Thierry Breton, a pro-censorship crusader who was, at the time, European Commissioner for Internal Market. Bretton has since resigned.

In response to Breton, Musk promised a “very public battle in court,” and revealed, “The European Commission offered X an illegal secret deal: if we quietly censored speech without telling anyone, they would not fine us. The other platforms accepted that deal. X did not.”

The Vice President-Elect argues that America’s participation in NATO should be contingent on the alliance’s respect for free speech, a core American value. “So what America should be saying is, if NATO wants us to continue supporting them and NATO wants us to continue to be a good participant in this military alliance, why don’t you respect American values and respect free speech?” Vance questioned. He criticized the notion of supporting a military alliance that does not uphold free speech as “insane,” insisting that American support comes with prerequisites, such as respecting free speech, particularly among European allies.

President-Elect Trump, Vance’s running mate, has been critical of some aspects of NATO, having expressed a desire to pull out from the alliance and disregard the Article 5 collective defense clause.