Democrat Ron Barber, who lost the closest congressional race in the country last year by 167 votes to freshman Republican U.S. Rep. Martha McSally, will announce whether he's in for a rematch on Zona Politics with Jim Nintzel, airing this Sunday at 9:30 a.m. on KGUN-9.

Barber was first elected to Congress in June 2012 in a special election to complete the term of Congresswoman Gabrielle Giffords, who stepped down to concentrate on her recovery from a gunshot wound to the head. Barber, who was also shot twice in the January 2011 mass shooting, went on to defeat McSally in a close race in November 2012.

McSally defeated Barber in a race so close that it required a state-mandated recount. Barber's supporters say that in a presidential election year, he could make up the difference and he remains the strongest candidate among Southern Arizona Democrats, particularly when it comes to name ID and the ability to raise the millions of dollars required for a competitive race.