A federal judge in Washington on Friday threw out a civil lawsuit brought by Paul Manafort, President Trump's former campaign chairman, that sought to challenge the authority of special counsel Robert Mueller in the Russia investigation. The decision was a blow to Paul Manafort's defense against numerous charges brought by special counsel Robert S. Mueller III and a rejection of his attempt to use a civil action to thwart his criminal prosecution. It was the first of Manafort's challenges to Mueller's authority. He has made similar arguments in moving to dismiss the two criminal cases against him.