Dan A. Sullivan, Republican former mayor of Anchorage, Alaska, announced his endorsement of GOP Sen. Dan S. Sullivan's bid for re-election. 

Sen. Sullivan is running against Dan J. Sullivan, a retired teacher, and Democrat Rep. Mary Peltola on Tuesday. 

“As the OG Dan Sullivan, I urge Alaskans to vote for Sen. Dan S. Sullivan. He’s been great for Alaska,” the former mayor said in a post on Facebook. 

In June, Alaska's Division of Elections determined that Republican Sen. Dan Sullivan's challenger was not eligible for the Senate primary in August because his candidacy was not done in actual "good faith." Both candidates were seeking the Republican nomination and would run against former Alaska Democratic Rep. Mary Peltola. Both men are running as Dan Sullivan, but with different middle initials. 

Alaska Division of Elections Director Carol Beecher said evidence shows Dan J. Sullivan chose the name and party because it was the same name and party as another candidate and was an attempt to confuse voters. However, later that month, a judge overturned Beecher's decision. 

“Instead, the decision was based upon a new, previously unstated, ‘good faith’ criteria,” the judge wrote, NBC reported.