Rep. Kelly Armstrong of North Dakota, who was backed by former President Donald Trump, won his state’s Republican nomination for governor, defeating Lt. Gov. Tammy Miller, the Associated Press projects.

North Dakota Gov. Doug Burgum, who decided against seeking a third term and has emerged as a potential running mate for Trump, had supported Miller as his successor. But Trump weighed in late last month with an endorsement for Armstrong, who was considered the favorite to win the primary. 

“In Congress, Kelly strongly defended me through two SHAM Impeachments, and is 100% MAGA,” Trump posted May 30 on Truth Social.

The primary represented an unusual split between Trump and Burgum, who have become close in recent months. Burgum, after ending his own run for president, endorsed Trump and has emerged as a top contender to be his vice presidential pick.

Asked about their different preferences in an interview on CNN, Burgum said North Dakotans were “so fortunate in our state [to] have two great candidates.”

“I’m supporting one, President Trump is supporting the other,” Burgum said. “But whoever wins that primary in about 12 days from now, North Dakota is going to have a great governor.”

Armstrong will face state Sen. Merrill Piepkorn, who was unopposed for the Democratic nomination, in the general election. North Dakota, a heavily Republican state, has not elected a Democratic governor in nearly 40 years. Burgum won re-election in 2020 by more than 40 percentage points.

Armstrong, 47, has represented North Dakota’s at-large congressional district since 2019. He previously served as chair of the state’s Republican Party. 

“Since we started, we’ve gone from one end of the state to the other,” Armstrong said of his campaign during a May 30 debate with Miller. “We’ve done over 100 media interviews, and we have got the opportunity to meet with 1000s of North Dakotans across the state. And that won’t change when I’m governor. I just simply don’t know another way to do this job.” 

Miller, 64, presented herself as a political outsider. Like Burgum, she had deep private sector experience before entering politics, having served as CEO of a large electrical distributor. Burgum appointed Miller lieutenant governor in 2022, after her stint as the governor’s chief operating officer. 

“Our country and our state have done so well with leaders who have business experience like Gov. Burgum and President Trump,” Miller said at last month’s debate. “We need another outsider and business leader in the governor’s office.”

Armstrong and Miller both campaigned as Trump loyalists. At their recent debate, held hours after a jury found Trump guilty on 34 felony counts in his hush money trial, both defended the former president.

“I used to do this for a living,” Armstrong, a lawyer, said. “And I don’t know what the hell he got convicted of.”

Miller, like other Republicans, characterized the trial as a political prosecution.

“We would not have had any of these cases if President Trump was not seeking re-election,” she said. “This is typical politics, a strategy to keep him off the campaign trail.”