The 2013 Detroit mayoral election was held on November 5, 2013, following a primary election on August 6, 2013. Incumbent Mayor Dave Bing announced that he would not run for re-election, and instead opted to form an exploratory commission to run for Wayne County Executive in 2014. A crowded field of candidates emerged to succeed Bing, with Mike Duggan, the CEO of the Detroit Medical Center and the former Wayne County Prosecutor, emerging as the frontrunner. However, Duggan was disqualified from the race for failing to meet residency requirements, so he continued his campaign as a write-in candidate. He placed first in the primary election, receiving 52 percent of the vote to Wayne County Sheriff Benny Napoleon's 30 percent. In the general election, Duggan defeated Napoleon by a wide margin, 55–45%, becoming the city's first White mayor since 1973, when Coleman Young was elected.