FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. Senate Democrats are launching two ads in North Dakota criticizi

 

              FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. Senate Democrats are launching two ads in North Dakota criticizi
FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. Senate Democrats are launching two ads in North Dakota criticizing Republican Rep. Rick Berg over the stalled farm bill. Berg is locked in a close race with Heitkamp for the open seat. (AP Photo/Dale Wetzel, File )