Thousands of undocumented migrants in Portugal are being given a stark ultimatum this week: leave voluntarily or face deportation. The government warns that as many as 18,000 people could be affected by the crackdown, a move that comes just weeks ahead of a snap election. Critics accuse the center-right administration of using migration policy to court far-right voters in a tense political climate. The World’s Europe Correspondent Orla Barry reports.