Heitkamp's win means Democrats expanded their Senate majority by two seats.
Republicans didn't win the White House or Senate, but they held the House.
Republicans pick up a seat in the Cornhusker State.
The embattled Republican proved to be no match for the Democratic incumbent.
Donnelly defies the partisan tilt of the state to pick up a seat for Senate Democrats.
Murphy turns back McMahon, who spent millions of her own money on a second straight Senate campaign.
A new poll that shows Sen. Scott Brown (R-Mass.) tied with Democratic challenger Elizabeth Warren stands in contrast to other recent surveys showing Warren leading slightly.
With a week left in the campaign, a new TV ad from Sen. Claire McCaskill (D-Mo.) includes footage of the interview in which Rep. Todd Akin (R) said "legitimate rape" rarely causes pregnancy.
The Republican presidential nominee is giving the Indiana treasurer a much-needed down-ballot boost.