The state Supreme Court on Tuesday denied a complaint from Donna Brandenburg asking for her to be listed as a candidate for governor in the August 2 Republican primary. The court’s ruling is the latest setback for multiple Republicans hoping to topple Gretchen Whitmer, the Democratic governor of a key swing state.

In Michigan, candidates for governor must submit petitions with enough valid signatures to qualify for the ballot. The Michigan Board of State Canvassers last month deadlocked on certifying five Republican candidates for governor, reports the Michigan Advance.

The deadlock on the four-member panel, split evenly between Democrats and Republicans, meant that financial adviser Michael Markey, former Detroit Police Chief James Craig, self-described “quality guru” Perry Johnson, Michigan State Police Captain Michael Brown, as well as Brandenburg were all disqualified from the primary ballot, according to the Advance.

The board’s deadlock followed a report from the state Bureau of Elections that found tens of thousands of fraudulent signatures in numerous petitions for office, calling the number “unprecedented.”

Brandenburg, a businesswoman, filed a complaint this month with the Michigan Supreme Court, arguing she was improperly kept off the ballot. However, the court, in highly technical order, denied her complaint.

Scott Smith, attorney for Brandenburg, told Newsweek that the complaint argued his client submitted enough valid signatures that were overlooked by election officials. He said Brandenburg has the option to appeal her case in federal court, which he said Johnson has done.

The court’s decision, he said, raises bigger questions about the state’s election system.

“I think the big issue comes down to, is there election integrity, and if (officials) have the discretion to do whatever they want, how can anyone have confidence in them?” he said.

In addition to Brandenburg, three other disqualified Republican candidates have also lost court challenges.

At the moment, there are five candidates on the August 2 ballot: activist Ryan Kelley, businessman Kevin Rinke, right-wing media personality Tudor Dixon, chiropractor Garrett Soldano and the Rev. Ralph Rebandt, according to the Advance.

Polls show Whitmer, who faced a kidnapping plot and a polarized environment, is currently favored to win re-election in the divided state. She was elected in 2018 with 53 percent of the vote.

The Michigan secretary of state’s office declined comment.

Update 6/13/22, 4:10 p.m. ET: This article has been updated with a response from the Michigan secretary of state’s office to a request for comment.