A longtime top assistant has been named acting U.S. Attorney for the Southern District of Illinois.  63-year old Jim Porter of Millstadt told The Belleville News-Democrat on Monday that he hopes to be appointed to the position permanently.  Porter temporarily replaces U.S. Attorney Steve Wigginton who left the job earlier this month for a job at a private law firm in Saint Louis.  Wigginton had held the job since 2010.  Porter has worked for the southern district for nearly 30 years.  The U.S. Department of Justice has more than six months under the law to name a permanent replacement.