The move is only the most recent initiative in the government’s efforts to discourage or prevent foreign nationals from taking jobs that President Donald Trump says he wants to keep open for U.S.

People with work permits have been arrested in Louisiana and are now fighting their immigration case from detention.

The line stretches down the block before the sun rises in Los Angeles, made up of immigrants seeking help to renew their work permits under a program that has shielded them from deportation but is now ...