(AP) — Four Republicans and two Democrats are vying to become Nebraska’s next attorney general in a rare, contested primary.

The job opened suddenly in February, when Republican Jon Bruning announced he would run for governor instead of seeking re-election to the office he has held since 2003. So far, the race has focused on the candidates’ legal experience and how they would use the office if elected.

GOP hopefuls Brian Buescher, Mike Hilgers, Doug Peterson and state Sen. Pete Pirsch have all cast themselves as champions of states’ rights.

Democratic candidates Al Eurek and Janet Stewart say they would focus on public safety and consumer fraud, and both have promised not to use the position as a step to higher office.

The primary election is May 13.