Large-scale arrests outside immigration courts have unleashed fear among asylum-seekers and immigrants who are accustomed to remaining free while judges grind through a backlog of 3.6 million cases.

Explaining immigration court with crayons Flores tells the story of the cartoon cat, known as Fulanito to children 12 years old and under. Fulanito, in Flores’ story time, ...

Migrants are being detained by immigration agents in courthouse hallways nationwide, sometimes moments after pleading their cases, raising alarm among attorneys and advocates.

A hearing on Tuesday at immigration court in Van Nuys, Calif., was supposed to be routine for a young family from Colombia, the first step in what they hoped would be a successful bid for asylum.