The measure would end public benefits to illegal residents, challenge the citizenship of their U.S.-born children, cut welfare payments to those children and impose new birth certificate requirements. The target: Illegal immigrants and their U.S.-born children who receive public benefits. The plan: a California ballot initiative that would end public benefits for illegal immigrants, cut off welfare payments for their children and impose new rules for birth certificates. "We will be out in full force to qualify this initiative," said Barbara Coe, who helped develop Proposition 187, the 1994 measure that would have ended benefits to illegal immigrants but was...