NORTH CAROLINA -

North Carolina voters are choosing their parties' candidates for a competitive U.S. Senate seat, the state Supreme Court and dozens of other state and federal offices.

Local election workers have opened more than 2,700 precinct locations for Tuesday's primary election. Eight Republicans are seeking their party's nomination to challenge Democratic Sen. Kay Hagan. She has her own primary against two lesser-known opponents. The Libertarians also are choosing a Senate nominee.

Supreme Court Associate Justice Robin Hudson had two challengers for her seat. The top two-vote getters advance to the November election. In partisan races, a leading candidate needs more than 40 percent of the vote to avoid a summer runoff.

More than 259,000 cast ballots in person during the early-voting period.

Polls close at 7:30 p.m.