4 GOP candidates trying to grab Giffords AZ seat

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PHOENIX (AP) -- Republicans in southern Arizona's 8th Congressional District go to the polls Tuesday to choose who will face former Gabrielle Giffords aide Ron Barber in a special election to replace the wounded ex-congresswoman.

The four GOP candidates are battling in a snap election called after the Democrat resigned in January. She tapped Barber as her preferred replacement, and he has drawn strong financial support and no challengers in his party's primary.

That leaves the GOP foursome to duke it out in the special primary election.

The four include 2010 Giffords opponent Jesse Kelly, a businessman and tea party favorite, state Sen. Frank Antenori, retired U.S. Air Force pilot and political newcomer Martha McSally, and businessman and broadcaster Dave Sitton.

Polling is scarce, but Kelly's name recognition may give him an advantage.