Gov. Dave Heineman announced he's endorsing attorney general Jon Bruning in the Republican primary race for governor.  Heinman and Mayor Jean Stothert announced their support at a press conference Wednesday morning.

The announcement is potentially huge for Bruning, who has been locked in a tight, six-man GOP primary race. Heineman, the state's longest-serving governor and a popular Republican figure in Nebraska, had previously said he might endorse in the race. 

The other candidates are Omaha businessman Pete Ricketts, Omaha tax attorney Bryan Slone, State Auditor Mike Foley and state Sens. Tom Carlson of Holdrege and Beau McCoy of Omaha.