Warren said Friday that a promotion to interim marketing officer at Blue Cross prompted him to leave the race against Assistant Senate Democratic Leader Les Bock, a three-term lawmaker.
"I had to make a really tough decision and I didn't make it lightly," Warren said. "I figured it was better to send up the flag early rather than later."
Warren is continuing in his position as vice president of account management, but said he plans to apply for the marketing officer job when it is posted.
Warren also ran in 2008, falling just 21 votes short to Christ Troupis in the GOP primary. "I'm still healing from that one," Warren said, adding that he plans to remain engaged in politics. Bock defeated Troupis in the general election.
A replacement for Warren will be named before the Idaho Republican convention begins in Twin Falls June 21. District 16 Republicans will meet at 7 p.m. June 18 at the Ada County Courthouse to pick a new nominee, said District Chairman Taso Kinnas.
Warren was unopposed in the May primary.
Prospective candidates should email a letter of interest and brief biography by 5 p.m. June 15 to Kinnas at email@example.com. Kinnas asks that the letter identify some of the major issues facing Idaho and how they should be addressed.
District 16 includes Garden City, Northwest Boise and the Boise Bench north of I-84 and roughly east of Cloverdale and Eagle roads.