 The party participated in the 2015 and the 2016 elections, but did not do well, scoring 0.23% and 0.20% of votes respectively.After the Catalan referendum of 2017 and the start of a Spanish constitutional crisis, Vox opted to not participate in the Catalan regional elections of 2017.After the Catalan declaration of independence, the party sued the Parliament of Catalonia and several independentist politicians the number of its members increased by 20% in forty days.