MADRID—Spain returned to the polls Sunday for the fourth time in four years, and just six months since its last election. After giving the center-left Socialist Party, the leftist Podemos party and center-right party Ciudadanos, or Citizens, the opportunity to form a government in April, voters punished them this time around for failing to do so. The Socialists lost three seats in parliament, again falling short of a majority despite winning the most seats. Podemos lost seven seats and Ciudadanos a jaw-dropping 47, the biggest setback yet for the centrist upstarts. While voter turnout was about 5 percent less than in April, those that did vote gave the biggest boosts to the traditionally conservative Popular Party, which gained 22 more parliamentary seats, and the far-right Vox party, which more than doubled its seats from 24 to 52, making it the third-largest party in parliament. (read article)