washington andrew olmem attorney former republican congressional aide join white house national economic council deputy gary cohn say two source familiar move olmem attorney senate bank committee financial crisis leave job venable llp last week say law firm olmem lead staff negotiator work 2010 dodd-frank act lead wall street reform accord venable notice mr olmem particularly involve provision deal regulation resolution systemic financial institutions federal reserve liquidity program financial regulatory structure prudential regulation financial institutions accord profile white house immediately respond request comment national economic council coordinate economic policy across president donald trump cabinet clear post olmem hold attorney olmem join white house economic council source