Lawrence Herrera started carrying a folded-up copy of his birth certificate in his wallet last week. He also saved a picture of his passport on his phone’s camera roll. For the 67-year-old Atwater Village resident who was born and raised here, the precaution felt silly. But he’s not taking any chances. “I started hearing, ‘He’s taking anyone and everyone,’” Herrara said, referrring to President Trump’s immigration crackdown. “I thought, ‘You know what? That could be me.’” Herrera was one of hundreds of protesters who spent Fourth of July in downtown Los Angeles to rally against the immigration raids that have...