** FILE ** North Dakota Attorney General Wayne Stenehjem, left, speaks while North Dakota Secretary of State Al Jaeger listens at a news conference on the results of an investigation into petition fraud, Tuesday, Sept. 4, 2012 in Stenehjem's office at the Capitol in Bismarck, N.D. (Associated Press)

** FILE ** North Dakota Attorney General Wayne Stenehjem, left, speaks while North Dakota Secretary of State Al Jaeger listens at a news conference on the results of an investigation into petition fraud, Tuesday, Sept. 4, 2012 in Stenehjem's office at the Capitol in Bismarck, N.D. (Associated Press)