In Orange County, Calif., dozens of immigrant parents have signed legal documents authorizing friends and relatives to pick up their children from school and access their bank accounts to pay their bills in the event they are arrested by immigration agents. In Philadelphia, immigrants are carrying around wallet-size “Know Your Rights” guides in Spanish and English that explain what to do if they’re rounded up. And in New York, 23-year-old Zuleima Dominguez and other members of her Mexican family are careful about answering the door and start making worried phone calls when someone doesn’t come home on time. Read More: Trump’s Immigration Crackdown Seems Designed to Spread Fear Around the country, President Donald Trump’s efforts to crack down on the estimated 11 million immigrants living illegally in the U.S.