(FILES) In this file photo taken on February 06, 2018 Spanish Prime minister Mariano Rajoy arrives to receive his Portuguese counterpart prior to holding a meeting at 'La Moncloa' palace in Madrid. Spain's centrist Ciudadanos, Prime Minister Mariano Rajoy's ally in parliament, on May 25, 2018 called for a snap poll after Rajoy's conservative Popular Party was sentenced in a major graft trial. / AFP PHOTO / PIERRE-PHILIPPE MARCOU