Former Gabrielle Giffords aide Ron Barber wins election to finish her term

In an election to fill former Rep. Gabrielle Giffords', left, D-Ariz., congressional seat, Democratic candidate Ron Barber, right, celebrates a victory with Giffords and supporters at a post election event, June 12, 2012, in Tucson, Ariz. pool,AP Photo/Ross D. Franklin

Updated at 3:30 a.m. Eastern.

(AP) PHOENIX - Former Rep. Gabrielle Giffords' hand-picked Democratic candidate won a special election Tuesday in southern Arizona to finish her term, defeating a Republican who narrowly lost to Giffords in 2010.

The race was a hard-fought preview of the broader fall campaign as the two political parties used the contest to hone and test their political arguments for the November elections, when everything from the White House on down will be on the ballot.

Giffords had stepped down earlier this year to focus on her recovery from the gunshot wound she suffered in 2011 during a shooting rampage at a Tucson, Ariz., parking lot that killed six people and wounded 13. One of the wounded was Ron Barber, an aide to the congresswoman who will now serve the remainder of her term.

Republicans, sensing a chance to capture the seat, sought to make the special election a referendum on President Obama and his handling of the economy. They argued that Barber, who was asked by the lawmaker to pursue the seat, would fall in line behind the White House.

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Democrats, in turn, played to the senior vote by contending that Republican Jesse Kelly would not protect Medicare and Social Security.

With 86 percent of precincts reporting, Barber was winning about 52 percent of the vote while Kelly had 45 percent.

Complete coverage: Election 2012

Both candidates have promised to run for a full term in the fall, setting up a possible November rematch in a redrawn district that is friendlier to Democrats. Republican voters outnumber Democratic voters by about 26,000 under the current map. That edge will narrow to about 2,000 under redistricting.

Other primary elections

Elsewhere Tuesday, Virginia, Maine, Nevada, Arkansas and South Carolina held primary elections -- with most of those states choosing Senate nominees -- as did North Dakota, where voters decided to let the University of North Dakota scrap its controversial nickname, the Fighting Sioux.

In Virginia, former Sen. George Allen brushed aside three rivals in the Republican Senate primary. Allen's victory set up a November clash with another former Virginia governor, Democrat Tim Kaine, in a campaign closely tied to the presidential race in a state both parties consider vital for victory.

In North Dakota, Rep. Rick Berg defeated businessman Duane Sand in the state's Republican Senate primary. Berg now faces Democrat Heidi Heitkamp in the November race to replace retiring Sen. Kent Conrad. The election is expected to play a critical role in determining which party controls the Senate next year.

The vote concerning the Fighting Sioux nickname came about after the NCAA deemed it hostile and abusive, and placed the university under postseason sanctions. The state's Board of Education is now expected to retire the moniker and American Indian head logo.

North Dakota voters also defeated a proposal that would have made the state the first in the nation to abolish local property taxes.

In Nevada, Republican Sen. Dean Heller and Democratic Rep. Shelley Berkley easily defeated a slate of political unknowns in their respective primaries. Their fall race will be one of the most competitive in the country.

In Maine, state Sen. Cynthia Dill won the Democratic primary in the race to succeed Republican Sen. Olympia Snowe. Maine Secretary of State Charles Summers won the GOP nomination.

The front-runner, former two-term Gov. Angus King, wasn't on the ballot because he's running as an independent.

No statewide races were part of the Arkansas and South Carolina primaries.

All eyes on Arizona

Of all the races Tuesday, the Arizona House race was the most closely watched, partly because of Giffords' absorbing story and partly because holding onto the seat was important for Democrats if they want to regain control of the House.

The party needs big gains in November to grab the majority from Republicans, who now hold a 240-192 advantage with three vacancies, including Giffords' seat.

Republicans, riding high after a decisive victory in Wisconsin's gubernatorial election last week, set their sights on Arizona. A victory would have given party leaders a chance to claim momentum five months before November and fine-tune their plan to link Democratic candidates to Obama, the incumbent at the top of the ticket.

Giffords, 42, largely shunned public appearances during the race, but in the closing days of the campaign she stepped out to help Barber.

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