A United States lawmaker has introduced a bill seeking to abolish dual citizenship for American nationals, a move that could affect thousands of Nigerians who hold both US and Nigerian passports.
Bernie Moreno, a Colombian-born US senator, announced the proposed legislation — titled the Exclusive Citizenship Act of 2025 — arguing that the current system, which allows Americans to hold multiple nationalities, creates “conflicts of interest and divided loyalties.”
“One of the greatest honours of my life was when I became an American citizen at 18, the first opportunity I could do so.
“It was an honour to pledge an Oath of Allegiance to the United States of America and only to the United States of America! Being an American citizen is an honour and a privilege—and if you want to be an American, it’s all or nothing. It’s time to end dual citizenship for good,” Moreno said.
Moreno, who has since renounced his Colombian citizenship, maintains that exclusive allegiance is essential to national integrity.
If passed, the bill could have far-reaching implications for prominent figures such as US First Lady Melania Trump, who holds both US and Slovenian citizenship. It would also significantly impact Nigerians with dual citizenship.
According to a July naturalisation flow report by the US Department of Homeland Security, 38,890 Nigerians became naturalised American citizens between 2021 and 2023. Nigeria ranked 13th among countries with the highest number of new US citizens and was the only African nation in the top 20.
Nigerian law allows citizens by birth to hold dual nationality without relinquishing their Nigerian citizenship.
This development comes months after President Donald Trump issued an executive order aimed at denying automatic US citizenship to children of undocumented immigrants born in the country.
The order was immediately challenged by 18 states and multiple rights groups, who argued it violates the 14th Amendment’s guarantee of birthright citizenship. Ongoing legal battles have prevented the order from taking effect.