A poster reading “To break away from Europe at a time like this – No to the SVP Chaos Initiative”, featuring images of President Donald Trump, Russian President Vladimir Putin and Chinese President Xi Jinping, urging people to vote against the Swiss People’s Party (SVP) referendum titled “No to a Switzerland with 10 million inhabitants” photographed in Bern, May 18, 2026. (Christian Beutler/Keystone via AP) Swiss voters will decide on Sunday whether to back a controversial proposal to cap the country’s population, in a closely watched referendum that has sharply divided opinion across political and economic lines. The vote, part of Switzerland’s system of direct democracy, is expected to be tight, with polling suggesting no clear outcome ahead of the ballot.Also Read: Why Switzerland is voting to cap its population at 10 millionVoting