Rep. Phil Gingrey, one of more than a half-dozen Republicans running for Georgia’s open Senate seat in 2014, vowed to repeal Obamacare in his first term as a senator or “go home.”

The six-term Georgia Republican made the promise in a television advertisement released Tuesday. Gingrey, a physician, is backing the 30-second spot with a six-figure buy to run for 10 days in Georgia’s four largest media markets, according to his spokesman.

“As a doctor, I took an oath to do no harm. And Obamacare is so harmful, I voted to repeal or defund it over 40 times,” Gingrey, wearing his white doctor’s coat, says in the ad. “But our efforts die in the Senate. I’ll help repeal Obamacare in my first term, or go home.”

Gingrey’s ad marks the first television spot in the race to replace retiring GOP Sen. Saxby Chambliss.

Gingrey is one of at least eight GOP candidates seeking the seat. Other top Republicans in the race include Reps. Jack Kingston and Paul Broun, former Georgia Secretary of State Karen Handel and businessman David Perdue.

Whichever Republican emerges from the primary will face likely Democratic nominee Michelle Nunn in November 2014.

Georgia’s Senate race is rated a Republican Favored contest by Rothenberg Political Report/Roll Call.