Democratic U.S. Senate candidate Heidi Heitkamp, center, talks as she greets elections volunteers Stef Claus, left, and Matt Traylor in Fargo, N.D, Tuesday, Nov. 6, 2012.  Heitkamp is running against Republican Rick Berg for the North Dakota's U.S Senate seat. (AP Photo/LM Otero)

Photo by: LM Otero

Democratic U.S. Senate candidate Heidi Heitkamp, center, talks as she greets elections volunteers Stef Claus, left, and Matt Traylor in Fargo, N.D, Tuesday, Nov. 6, 2012. Heitkamp is running against Republican Rick Berg for the North Dakota's U.S Senate seat. (AP Photo/LM Otero)