An undocumented Mauritanian national living in Philadelphia has been arrested on charges of illegally voting in multiple federal elections dating back to 2008, federal authorities said. Mahady Sacko, 50, is accused of registering and casting ballots despite not being a U.S. citizen, according to a criminal affidavit. He first registered to vote in 2005, according to the documents. Immigration and Customs Enforcement's Enforcement and Removal Operations arrested Sacko in an operation, with