Immigrants and advocacy groups nationwide are scrambling to prepare for the waves of raids President Trump has promised under his plan to deport millions of people unauthorized to stay in the U.S. Why it matters: Confusion and persistent rumors about how the raids will be carried out — and what will happen to those detained by immigration agents — are leading some anxious immigrants to refuse to go to work or send their children to schools,

Details of planned immigration raids are unclear, but they would be the opening step in the president-elect’s goal of overseeing the largest deportation program in history.

Immigrants in Chicago and other U.S. cities have been preparing for immigration arrests since President-elect Donald Trump won the November election.