Congressional Republicans are demanding changes to a 2008 law requiring migrant children whose countries of origin are other than Canada or Mexico be placed with sponsors in the United States if they are subject to deportation proceedings, which can last years. Former President George W. Bush signed the law as a measure against human trafficking, but some lawmakers want an expedited process as President Barack Obama seeks $3.7 billion to address an influx of children crossing the border illegally, the Wall Street Journal said.