The Justice Department on Friday filed a lawsuit to block the results of Alaska’s highly competitive Senate race in November should it be impacted by “voter confusion.”

Republicans have said they are worried about the race, which features Sen. Dan Sullivan (R-AK) and Democrat Mary Peltola as the primary contenders, because of the presence of a second Dan Sullivan on the state’s ranked-choice ballot. After the second Sullivan garnered 2.5% of the total vote in the primaries, Republicans fear the setup in the general election could confuse voters, possibly costing the GOP precious votes in the tight race. Control of the Senate could hinge on the Alaska election.

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