2006 Arizona's 8th congressional district election

• Frank Antenori (Republican), U.S. Army veteran[1]
• Gabby Giffords (Democratic), former state senator
• Randy Graf (Republican), former state representative
• Mike Hellon (Republican), former chair of the Arizona Republican Party[2]
• Steve Huffman (Republican), state representative
• Michael T. Jenkins (Republican), automobile repair shop owner[3]
• William Daniel Johnson (Democratic), white nationalist activist[4]
• Jeffrey Lynn Latas (Democratic), U.S. Air Force veteran[5]
• David F. Nolan (Libertarian), co-founder of the Libertarian Party
• Patty Weiss (Democratic), television anchor[6]
• Alex Rodriguez (Democratic), member of the Tucson Unified School District board[7]
• Francine Shacter (Democratic), former Democratic precinct chairwoman[8]

Incumbent Republican Jim Kolbe announced on November 23, 2005, that he would not seek re-election in 2006.[9] The district, located in Southeastern Arizona and based in the suburbs of Tucson, was Republican-leaning, but competitive: George W. Bush had won the district with 53% of the vote in 2004 (although only 50% in 2000). Kolbe had barely won the seat in 1984, but had usually skated to reelection since then. Even after coming out as gay in 1996, he remained very popular in the district, taking 61% of the vote in 2004. Although Kolbe was generally thought to be all but unbeatable in the district, it was widely believed that it would be very competitive once he retired.[10]

Randy Graf, the primary winner, left a leadership position in the state House in 2004 to challenge Kolbe in the Republican primary. Graf had won 40 percent of the vote and had campaigned almost full-time since.[11] A supporter of the Minuteman Project, Graf campaigned on a pledge to ensure that illegal immigrants had no path to citizenship and that the border would be further secured.[12] Graf previously sponsored a bill (which did not pass) to allow patrons carry guns into bars and restaurants.[12]

The GOP establishment, however, considered Graf as too conservative for a district that leaned Republican but gave President Bush only 53 percent of the votes in 2004, and tried to rally voters around moderate state representative Steve Huffman.[13] However, another more moderate candidate, former Arizona Republican Party chairman Mike Hellon, also gained significant support, which split anti-Graf support and prevented Huffman from consolidating the moderate lane.[14]

Huffman got a boost when the national GOP took the rare step of endorsing and supporting Huffman, putting $250,000 into the race. The other GOP candidates criticized the move as unfair. The national Democratic party spent nearly $200,000, much of it on advertisements critical of Huffman in an effort to help Graf's candidacy, believing Graf would be the weaker candidate in the general election.[12]

Huffman's campaign was injured when, according to CQPolitics: "there were allegations that his (Huffman's) campaign treasurer, local real estate broker William Arnold, had stalked Hellon’s ex-wife, state Sen. Toni Hellon". Arnold quit as treasurer after Hellon obtained a restraining order against him, and Huffman’s campaign said it had no involvement in Arnold’s actions." The scandal expanded when it was revealed that unauthorised photos of Toni Hellon had been posted to a website owned by the same individual who had designed Huffman's campaign website.[13] As a result of the incident, the Tucson Weekly withdrew its support for Huffman.[13]

Gabby Giffords, who was former State Senator, resigned from the Arizona Legislature just eight days after Kolbe's announcement, in order to run for his seat. She quickly established herself as the front-runner, largely on the basis of her legislative record. She also gained some beneficial publicity when it was revealed that she was engaged to space shuttle astronaut Mark Kelly.[13] Her only serious competition was longtime KVOA television newscaster Patty Weiss, who ran as a more liberal alternative to Giffords.[17]

• Gabby Giffords (Democratic), former state senator
• Randy Graf (Republican), former state representative
• David F. Nolan (Libertarian), co-founder of the Libertarian Party
• Jay Quick (Independent), geologist and businessman[19]
• Russ Dove (Write-in), militiaman and convicted felon[20]
• Leo F. Kimminau (Write-in)[21]
• Paul Price (Write-in)[21]

Graf's campaign got off to a rough start in mid-September when outgoing Republican incumbent Jim Kolbe withheld his endorsement, citing "profound and fundamental differences" between their views.[22][23] The Arizona Republic wrote that a "victory by Graf would in effect repudiate much of Kolbe's work on what has come to be known as 'comprehensive' immigration reform. In contrast with 'enforcement only,' Kolbe’s plan would create a guest-worker program and an opportunity for undocumented residents to become citizens eventually."[11]

In mid-August CQPolitics changed their rating of the race from "Leans Republican" to "No Clear Favorite".[24]

By late September, Graf's position had continued to deteriorate. The Cook Political Report changed their rating from "Toss Up" to "Leans Democratic",[25] and the national Republican Party cancelled about $1 million in advertising support.[26] Two days later, in what was seen as a diminished level of national influence and interest in what had long been considered a competitive race, the national Democratic party also pulled their financial support.[27]

On September 20, 2006, Gabby Giffords' campaign released an internal poll that showed her leading Republican candidate Randy Graf by 19 percentage points.[29] The poll showed Giffords with 54% of the vote and Graf with 35%. The poll was based on responses from 500 likely general election voters and had a +/-4% margin of error.

Results from a second poll conducted during the same time period confirmed a Giffords lead while suggesting a slightly tighter race.[30] This independent poll, conducted by 1 to 1 Direct and Marketing Intelligence, showed Giffords with a 12-point lead (Giffords [48], Graf [36], +/-4% MoE).

On October 4, Zogby released a poll showing Giffords with a 45–37 percent lead.[31]

Giffords was declared the winner 37 minutes after the polls closed. Graf conceded defeat at 10:08 P.M. EST.[41]