Eric Johnson had been running for lieutenant governor. He decided to switch races after Lt. Gov. Casey Cagle withdrew from the governor's contest citing health problems. Cagle said he'd seek re-election to his current seat. That would've pitted him against Johnson.
Johnson made the announcement today.
He's the former president pro tem of the state Senate and pushed unsuccessfully this year to make Georgia the first state in the nation to offer universal school vouchers.
Johnson joins three Republicans already in the race: Secretary of State Karen Handel, Insurance Commissioner John Oxendine and state Rep. Austin Scott.