Democrats retained their majority on the Pima County Board of Supervisors, with incumbents Richard Elías, Sharon Bronson and Ramón Valadez all victorious Tuesday night.

Democratic Sheriff Clarence Dupnik won a tight race for his ninth four-year term. He had 49.9 percent of the vote to Republican Mark Napier's 46.7 percent and Green Party candidate David Croteau's 3.0 percent. Dupnik's margin of victory was more than 8,000 votes with only provisional ballots to be counted.

Republicans had hoped to make inroads to Democratic-dominated county government, but the voters turned them back.

The key supervisorial race was Bronson's, whom the GOP targeted as most vulnerable among the long-serving Democrats on the board. But she was well ahead of challenger Tanner Bell, 53.7 percent to 46.2 percent with more than half the precincts counted.

Republicans had blamed Democrats for the county's poor economic performance and what they called lack of fiscal responsibility by the Democratic-dominated Board of Supervisors. Democrats in turn blamed Republican legislative takeaways of county money and promised to work for job growth.

In supervisors' District 1, Republican Ally Miller was in command, with 54.2 percent of the votes to 45.7 percent for Democrat and former state legislator Nancy Young Wright. District 1 incumbent Republican Supervisor Ann Day is completing her third term and is not seeking reelection.

In District 2, which has nearly twice as many registered Democrats as Republicans, Democratic incumbent Valadez beat Republican Jim Kelley 61.0 percent to 38.9 percent.

In District 5, where voter registration is nearly 3-1 Democratic over Republican, incumbent Democrat Richard Elías defeated Republican Fernando Gonzales 72.6 percent to 27.3 percent.

Republican Supervisor Ray Carroll, in office since 1997, was unopposed in District 4.

In the sheriff's race, Dupnik, in the post since 1980 and winner of eight straight elections, was challenged by Republican and retired law enforcement officer Mark Napier.

Dupnik stood on his 32-year record in office. Napier has said he will enforce laws, not engage in politics or political rhetoric, a direct jab at Dupnik for comments the sheriff made in the wake of the Jan. 8, 2011 Tucson shooting at a congressional constituents' event.

Dupnik, a political ally and friend of gravely wounded Congresswoman Gabrielle Giffords, lashed out at political extremism and blamed the vitriol for the shooting. Six people died and 12 others besides Giffords were wounded, including her successor in Congress, Democrat Ron Barber.

Both Dupnik and Napier were captains with the Tucson Police Department at different times -- Dupnik in the 1970s and Napier in the last decade.