- Source: 2018 United States Senate election in Arizona
The 2018 United States Senate election in Arizona took place on November 6, 2018. Incumbent Republican Senator Jeff Flake did not seek a second term. The election was held concurrently with a gubernatorial election, other elections to the U.S. Senate, elections to the U.S. House of Representatives, and various other state and local elections.
Primaries were held on August 28, 2018, three days after the death of longtime U.S. Senator John McCain. Martha McSally won the Republican nomination, while Kyrsten Sinema won the Democratic nomination. Green Party candidate Angela Green was also on the ballot, but ended her campaign and endorsed Sinema before Election Day.
The Associated Press called the race for Sinema on November 12, 2018, and McSally conceded that day. Sinema became the first Democrat to win a U.S. Senate seat in Arizona since 1988. McSally was subsequently appointed by Governor Doug Ducey to the other vacant Senate seat in Arizona, left open after McCain's death and then held on an interim basis by Jon Kyl.
Background
Arizona, located along the United States border with Mexico, has a unique political history. Upon its admission to the Union in 1912, the state was dominated by Democrats who had migrated there from the South, and aside from the landslide victories of Republicans Warren G. Harding, Calvin Coolidge, and Herbert Hoover, the state voted for Democrats until 1952, when Dwight Eisenhower carried it, and began a lengthy streak of Republican victories interrupted only by Bill Clinton's narrow victory in 1996. Since then, the state had remained Republican, and was won by Donald Trump with a 3.5% margin in 2016, although Trump's margin of victory was much smaller than that of past Republican presidential nominees.
Incumbent Republican Senator Jeff Flake announced in October 2017 that he would retire at the end of his current term instead of seeking reelection for another term in 2018. Flake had previously indicated his intent to run for reelection in March 2017. However, he was considered vulnerable due to persistently low approval ratings, a poor relationship with President Trump, and the threat of a primary challenge from former state senator Kelli Ward, who promised to run on a more pro-Trump platform. Additionally, he had won his first term in 2012 by only 3 percentage points, even though Republican presidential nominee Mitt Romney won Arizona by 9.
Republican primary
= Candidates
=On the ballot
Joe Arpaio, former Maricopa County sheriff
Nicholas N. Glenn (write-in candidate)
William Gonzales (write-in candidate)
Martha McSally, U.S. representative and retired U.S. Air Force Colonel
Kelli Ward, former state senator and candidate for the U.S. Senate in 2016
Failed to file
Craig Brittain, owner and co-founder of the revenge porn website IsAnybodyDown?
Christian "C.J." Diegel, financial advisor
Michelle Griffin
Shawn Redd
Nicholas Tutora, pharmacist
Withdrew
Jeff Flake, incumbent U.S. senator
Declined
Andy Biggs, U.S. representative from Arizona's 5th congressional district
Jan Brewer, former governor of Arizona
Mark Brnovich, attorney general of Arizona
Jeff DeWit, treasurer of Arizona (nominated as NASA chief financial officer)
Trent Franks, former U.S. representative
Paul Gosar, U.S. representative
Robert Graham, former chair of the Arizona Republican Party
Christine Jones, former GoDaddy executive, candidate for governor in 2014 and candidate for AZ-05 in 2016
Bill Montgomery, Maricopa County Attorney
Ben Quayle, former U.S. representative
Matt Salmon, former U.S. representative and nominee for governor in 2002
David Schweikert, U.S. representative from Arizona's 6th congressional district
John Shadegg, former U.S. representative
= Endorsements
== Polling
== Results
=Democratic primary
= Candidates
=On the ballot
Deedra Abboud, attorney
Kyrsten Sinema, U.S. representative
Failed to file
Bob Bishop, pilot
Matt Jette
David Ruben, physician
Chris Russell, attorney
Richard Sherzan, retired administrative law judge, former Iowa state representative and candidate for the U.S. Senate in 2016
Withdrew
Jim Moss, businessman, activist and former teacher
Declined
Randall Friese, state representative
Mark Kelly, astronaut, scientist, U.S. Navy captain and husband of former U.S. representative Gabby Giffords (later elected to Arizona's Class 3 Senate seat in 2020)
Ann Kirkpatrick, former U.S. representative and nominee for the U.S. Senate in 2016 (running for AZ-2)
Greg Stanton, Mayor of Phoenix (running for AZ-9)
= Endorsements
== Polling
== Results
=Libertarian primary
= Candidates
=Declared
Adam Kokesh (write-in candidate), anti-war activist and U.S. presidential candidate in 2020
Removed
Doug Marks, veteran and write-in candidate for IL-14 in 2010
Green primary
= Candidates
=Declared
Angela Green (write-in candidate)
Removed
Eve Reyes-Aguirre, activist
Results
General election
= Debates
=Complete video of debate, October 15, 2018
= Predictions
== Endorsements
== Fundraising
== Polling
== Results
=The race was too close to call on election day.
On November 7, 2018 (one day after the election), KGUN 9 reported that McSally held a narrow lead of 0.9%, with thousands of ballots still uncounted. On November 8, Politico reported that Sinema had taken a 9,610-vote lead. Due to the closeness of the vote count, the Associated Press and other major news outlets did not call the race for Sinema until November 12, 2018, six days after the election. McSally conceded the race to Sinema that day. The results were certified on December 3, 2018.
This was the first Senate election won by a Democrat in Arizona since 1988. Sinema is the first woman to be elected to the U.S. Senate from Arizona.
By congressional district
Sinema won 5 of 9 congressional districts.
Aftermath
On December 18, 2018, Governor Doug Ducey appointed McSally to fill Arizona's other Senate seat. The seat was left vacant after the resignation of Jon Kyl, who himself had been appointed following the August 25, 2018 death of John McCain. Both Sinema and McSally were sworn in with the 116th United States Congress on January 3, 2019, marking the first time in history that Arizona was represented by two women in the United States Senate and making Arizona the second state to be represented by two women from different parties. Ducey stipulated that Sinema would be sworn in first, making her the senior senator; this way, he said, the decision of Arizona's voters would be respected.
Under Arizona law, McSally's appointment was only valid for the duration of the 116th Congress, and a special election for her seat was held in November 2020 to determine who would finish the remainder of McCain's unexpired term (which expired in 2023). McSally was defeated by Democrat Mark Kelly in that special election.
Sinema would later leave the Democratic Party to become an independent in December 2022, although she would continue to caucus with them in the Senate until the end of her term.
= Voter demographics
=Notes
Partisan clients
References
External links
"Arizona Senate Election Results: Martha McSally vs. Kyrsten Sinema". The New York Times. January 28, 2019. (constantly updated)
Candidates at Vote Smart
Candidates at Ballotpedia
Campaign finance at FEC
Campaign finance at OpenSecrets
Official campaign websites
Kyrsten Sinema (D) for Senate
Martha McSally (R) for Senate Archived August 26, 2018, at the Wayback Machine
Adam Kokesh (L) for Senate Archived July 12, 2018, at the Wayback Machine
Angela Green (G) for Senate
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