BISMARCK, N.D. (AP) - The Latest on the North Dakota U.S. Senate race (all times local):
Republican Kevin Cramer says he thinks he's leading Democratic Sen. Heidi Heitkamp but the race is closer than polls suggest.
Cramer voted early Monday in Bismarck. He told reporters that his campaign's internal polling show him leading by double-digits, but he says he's still worried about the election.
He said he remembers Heitkamp trailing six years ago but going on to beat Rick Berg in a close race.
Heitkamp is battling hard for a second term, with a statewide bus tour that was wrapping up on her home turf of Fargo on Monday.
Republican Kevin Cramer and Democrat Heidi Heitkamp are finishing up their Senate race with a flurry of campaigning in North Dakota's capital city and across the state.
The race has big stakes for the state and the nation, with Republicans banking on it to help retain control of the Senate.
Incumbent Sen. Heitkamp plans stops Monday in Bismarck, Minot, Belcourt, Grand Forks and Fargo, where she will be Election Day.
Cramer was voting early on Monday in Bismarck and will remain there until the votes are tallied Tuesday. His campaign says he will do several radio interviews Monday.
Heitkamp, who is seeking her second term, is seen as one of the most vulnerable senators among red-state Democrats.