MEXICO CITY (AP) — Nicaragua's government on Sunday blocked Cuban citizens from entering the country without a visa, effectively cutting off a key route for Cuban migration to the United States at a time when the Trump administration has put the Caribbean island in an economic chokehold. Nicaragua’s government confirmed to The Associated Press that it suspended an exemption that allows Cubans to enter the Central American nation without a visa. The move would effectively cut off Cubans from a country that has long acted as a bridge for Caribbean migrants traveling to the U.S. For years, Cuban migrants would fly to Nicaragua and meet up with smugglers, who would then help them migrate north through Central America and Mexico to get to the U.S. border.