 Governor Mark Dayton appointed his successor, Tina Smith, on December 13, 2017, and she ran in the special election.This election coincided with a regularly scheduled U.S. Senate election for the Class 1 Senate seat, U.S. House elections, a gubernatorial election, State House elections, and other elections.The candidate filing deadline was June 5, 2018, and the primary election was held on August 14, 2018.