In a dilapidated farm shed in New York’s rural North Country‚ the belongings of a migrant family who quietly took shelter one night were still visible months later: some clothing and children’s shoes‚ stiffened by the cold and a thin blanket of snow. Thomas Brassard recalled his surprise when he saw the family — a husband‚ wife and two children — emerge from the shed as he started his truck in the early morning. They asked him in broken English if he could give them a ride to the nearest...