Spain has managed to remain immune to the rise of nationalist parties across Europe for decades. However, that immunity came to an end Dec. 2, when the anti-immigration Vox party secured a spot in a Spanish regional parliament for the first time by winning almost 11 percent of the vote. Having earned 12 seats in Andalusia's regional parliament, Vox will now be the fifth-largest party in the lawmaking body behind the center-left Socialist Party with 33 seats, the center-right Popular Party with 26 seats, the centrist Ciudadanos party with 21 seats and the left-wing Forward Andalusia with 17 seats. Considering how fragmented the new Andalusian parliament is, Vox could play kingmaker in appointing the next regional government. Moreover, the election in Spain's most populous region was widely seen as a preview of the next general election, which could happen well before the current government's term ends in 2020....