Hagan is considered one of the key
Republicans need six more Senate seats to gain the majority.
In another well-watched race, former "American Idol" star Clay Aiken was neck-and-neck in his bid for the Democratic nomination for a House seat in suburban Raleigh. With just over 40% of the vote, he held a slight lead over his main rival, former state Commerce Secretary Keith Crisco. But with 91% of the precincts reporting, the race was too close to call.
Whichever Democrat wins the nod, however, the district is tilted heavily Republican. The GOP incumbent, Rep.
Primaries were also held Tuesday in Ohio, where House Speaker
Boehner had taken the unusual step of running television ads to boost his campaign against newcomer J.D. Winteregg, a high school teacher.