Brazilians arrive in waves at the US-Mexico border

Growing up along the U.S.-Mexico border, hotel clerk Joe Luis Rubio never thought he'd be trying to communicate in Portuguese on a daily basis.The quiet migration of around 17,000 Brazilians through a single U.S. city in the past year reveals a new frontier in the Trump administration's effort to shut down the legal immigration pathway for people claiming fear of persecution.Like hundreds of thousands of families from Honduras, El Salvador, and Guatemala, known collectively as the Northern Trian