TIJUANA—Each night as Janiana tries to sleep, she wonders about what's going to happen to her baby grandnephew. The woman, a 26-year-old from Honduras, lives in a tent together with her 20-year-old niece, the baby's mother, in a tent village of hundreds of asylum seekers like them that formed right next to the pedestrian bridge that leads from Mexico into California. They're among the tens of thousands of people crowded in dire conditions across the length of the border who have fled violence, extreme poverty, natural disaster and other circumstances in their...
