Voters in Switzerland have cast their final ballots on Sunday on an initiative championed by the top right-wing party to cap the rich Alpine country’s population at 10 million. Early results showed Swiss voters were leaning against it.

The populist Swiss People’s Party, which has the most seats in parliament, has stirred up and fostered anti-migration sentiment over the years, notably about an influx of workers from the neighboring European Union.

Some have dubbed the proposal a “Swiss Brexit” because it could jeopardize Switzerland’s deep ties to the European Union anchored by deals that foster economic growth, cultural ties and cross-border travel, among other things. Switzerland is not one of the EU’s 27 member states, but it is all but surrounded by four of them

Recent polling from the gfs.bern agency suggested that it could be a close contest.

Preliminary results shared by the federal government showed that nearly 53% of voters rejected the proposal, with nationwide turnout exceeding 57%. Results were still pending from many of Switzerland’s 26 cantons.