The line of immigrants applying to become U.S. citizens is becoming longer.
There has been a backlog of citizen applications for years. But the backlog has increased dramatically since President Trump took office. Immigrant advocates say this has become the Trump administration's "second wall."
On a recent workday evening, three immigrants sit in a small airless room in San Francisco for a free citizenship class. Their instructor, Samuel Bianco, dictates some key facts about American civics, slowly, so they can take notes.