Swiss voters headed to the polls on Sunday to decide on a constitutional proposal that would cap the country’s population at 10 million by 2050, a referendum that could have significant implications for immigration policy, the economy, and Switzerland’s relations with the European Union.

The amendment, put forward by the right-wing Swiss People’s Party, would require authorities to ensure that the population does not exceed the proposed limit, amid concerns about immigration and increasing pressure on public services, infrastructure, and housing.

Official projections suggest that Switzerland is on track to reach a population of 10 million in the early 2040s if current demographic trends continue.

The vote comes as several European countries debate stricter immigration policies in response to concerns over living costs, slowing economic growth, and pressure on public resources.

Supporters argue that a population cap would help preserve infrastructure and public services, while opponents warn it could harm economic growth and reduce the country’s ability to attract skilled workers.