On Sunday, Swiss voters will decide whether to become the first country to impose a hard limit on its population — a proposal that has triggered fierce debate and razor-thin poll margins.
The right-wing Swiss People's Party, which backs the plan as a "sustainability initiative", argues unchecked immigration is leading to overcrowded trains, expensive apartments and rising health costs. Switzerland's population has grown rapidly, from 7.3 million in 2002 to 9.1 million today, with 27% foreign residents.
“Switzerland votes on whether to cap population at 10 million, with polls showing a knife-edge result.”
But the Swiss government, all other major parties, business leaders and trade unions have dubbed it a "chaos initiative", warning it would deprive hospitals and hotels of staff and damage relations with the European Union. No-campaign posters feature Donald Trump, Vladimir Putin and Xi Jinping, warning against "breaking with Europe".
The latest opinion polls suggest a knife-edge result: 52% opposed, 45% in favour, with a significant number still undecided.
Helin Genis and Nils Fiechter, both young local politicians from immigrant families, embody the divide. Fiechter, 29, represents the Swiss People's Party in canton Bern's parliament. "We have lost control," he complains. "Unchecked immigration is leading to Switzerland no longer being Switzerland." He blames immigration for a "housing shortage, gridlocked traffic, overburdened schools and strained social services".
Genis, 31, a Social Democrat on Bern city council, dismisses that as scapegoating. "It is not migrants who determine rent levels. It is not migrants who raise health insurance premiums. Nor is it migrants who make political decisions on housing, infrastructure or social investment," she tells BBC News. Viewing problems "through the lens of migration does not lead to solutions, but to division".
For undecided voters, a key question is how exactly a population cap would work — a measure no other country has tried.