sentences:  According to the same poll, 50% of the Swiss people supported full joint adoption for same-sex couples, while 39% were opposed and 11% were undecided.A December 2017 Tamedia poll found that 72% of Swiss people supported same-sex marriage, with 25% opposed.88% of Greens, Social Democrats and Green Liberals, 76% of Liberal voters, 66% of Christian Democrats, and 56% of Swiss People's Party voters expressed support.