If passed, Melania and Barron would face a choice: drop their Slovenian citizenship or their U.S. citizenship. Barron, born in March 2006, is a U.S. citizen by birth, while Melania gained citizenship in 2006 via a visa for individuals with extraordinary ability, according to a Washington Post investigation.

While Melania’s citizenship was obtained through a special visa, Barron’s citizenship is due to his birth in the U.S., which Trump’s proposed measures aim to challenge. The Trump administration has already attempted to restrict birthright citizenship, but those efforts are currently in court. Moreno’s bill raises questions about the future of dual citizenship and the legal status of the Trump family.