Venezuelans crossing a shallow patch of the Rio Grande into Del Rio, Texas in April. As doors close to them in South America – and as they misconstrue TPS in the U.S. – Venezuelan refugees are flocking to the U.S.-Mexico border and South Florida. Raquel is a single mother from Maracaibo, Venezuela. Six years ago she says she visited Cancún, Mexico, as a tourist. She enjoyed an all-inclusive resort. A tour of the Yucatán pyramids. But last month Raquel was back in Cancún as a refugee — on her way to cross Mexico's northern desert border and seek U.S. asylum.