Harris hopes to shore up her campaign’s standing across the upper Midwest, a critical region in presidential politics that often serves as a buffer for Democrats seeking the White House. The party remains haunted by Republican Donald Trump’s wins in Michigan and Wisconsin in 2016. Trump lost those states in 2020 but has zeroed in on them as he aims to return to the presidency this year and is expanding his focus to Minnesota.

Walz, 60, is joining Harris during one of the most turbulent periods in modern American politics, promising an unpredictable campaign ahead. Republicans have rallied around Trump after his attempted assassination in July. Just weeks later, President Joe Biden ended his reelection campaign, forcing Harris to unify Democrats and consider potential running mates during an exceedingly compressed time frame.

Read more: Tim Walz’s leadership resonates with my country’s Viking Code. Here’s why that matters

The three people who confirmed the choice of Walz spoke to The Associated Press on condition of anonymity because it had not been made public.

Harris, the first Black woman and person of South Asian descent to lead a major party ticket, initially considered nearly a dozen candidates before zeroing in on a handful of serious contenders, all of whom were white men. In landing on Walz, she sided with a low-key partner who has proven himself as a champion for Democratic causes.

Walz has been a strong public advocate for Harris in her campaign against Trump and Vance, labeling the Republicans “just weird” in an interview last month. Democrats have seized on the message and amplified it since then.

During a fundraiser for Harris on Monday in Minneapolis, Walz said: “It wasn’t a slur to call these guys weird. It was an observation.”

From football coach to governor

Walz, who grew up in the small town of West Point, Nebraska, was a social studies teacher, football coach and union member at Mankato West High School in Minnesota before he got into politics.

He won the first of six terms in Congress in 2006 from a mostly rural southern Minnesota district, and used the office to champion veterans issues. Walz served 24 years in the Army National Guard, rising to command sergeant major, one of the highest enlisted ranks in the military.

He ran for governor in 2018 on the theme of “One Minnesota” and won by more than 11 points.

As governor, Walz had to find ways to work in his first term with a legislature that was split between a Democratic-controlled House and a Republican-led Senate. Minnesota has a history of divided government, though, and the arrangement was surprisingly productive in his first year. But the COVID-19 pandemic hit Minnesota early in his second year, and bipartisan cooperation soon frayed.

Walz relied on emergency powers to lead the state’s response. Republicans chafed under restrictions that included lockdowns, closing schools and shuttering businesses. They retaliated by firing or forcing out some of his agency heads. But Minnesotans who were stuck at home also got to know Walz better through his frequent afternoon briefings in the early days of the crisis, which were broadcast and streamed statewide.

Walz won reelection in 2022 by nearly 8 points over his GOP challenger, Dr. Scott Jensen, a physician and vaccine skeptic. Not only did Walz win, Democrats kept control of the House and flipped the Senate to win the “trifecta” of full control of both chambers and the governor’s office for the first time in eight years. A big reason was the Supreme Court’s Dobbs decision, which held that the Constitution doesn’t include a right to abortion. That hurt Minnesota Republicans, especially among suburban women.

“Tim has been in the news because the country and the world is seeing the guy we love so much,” U.S. Sen. Amy Klobuchar Klobuchar said Monday.

Ken Martin, Chairman of the Minnesota-Democratic-Farmer-Labor Party said young people he spoke to on the campaign trail were “Walz pilled.”

Walz and other Democrats went into the 2023 legislative session with an ambitious agenda — and a whopping $17.6 billion budget surplus to help fund it. Their proudest accomplishments included sweeping protections for abortion rights that included the elimination of nearly all restrictions Republicans had enacted in prior years, including a 24-hour waiting period and parental consent requirements. They also enacted new protections for trans rights, making the state a refuge for families coming from out of state for treatment for trans children.

Help for families and school lunch

Their other major accomplishments included tax credits for families with children that were aimed at slashing childhood poverty, as well as universal free school breakfasts and lunches for all students, regardless of family income. They also enacted a paid family and medical leave program, legalized recreational marijuana for adults and made it easier to vote.

Walz also signed a bill banning so-called junk fees and presided over a statewide ban on non-compete agreements for workers, both check on corporate power that the Biden administration has haltingly pushed for on the federal level.

Republicans complained that Walz and his fellow Democrats squandered a surplus that would have been better spent on permanent tax relief for everyone. And they’ve faulted the governor and his administration for lax oversight of pandemic programs that cost taxpayers hundreds of millions of dollars.

Federal prosecutors charged 70 people with defrauding federal food programs that funded meals for kids during the pandemic out of $250 million on Walz’s watch. Known as the Feeding Our Future scandal, it’s one of the country’s largest pandemic aid fraud cases. The Office of the Legislative Auditor, a nonpartisan watchdog, delivered a scathing report in June that said Walz’s Department of Education “failed to act on warning signs,” did not effectively exercise its authority and was ill-prepared to respond.

Republicans still criticize Walz for his response to the sometimes violent unrest that followed the murder of George Floyd by a Minneapolis police officer in 2020, which included the torching of a police station.

During a May fundraiser in St. Paul, Trump repeated his false claim that he was responsible for deploying the National Guard to quell the violence. “The entire city was burning down. … If you didn’t have me as president, you wouldn’t have Minneapolis today,” Trump said.

It was actually Walz who gave the order, which he issued in response to requests from the mayors of Minneapolis and St. Paul. But within Minnesota, GOP legislators said both Walz and Minneapolis Mayor Jacob Frey were too slow to act. And there was finger-pointing between Frey and Walz on who was responsible for not activating the Guard faster.

Walz has served often as a Biden-Harris surrogate, and has made increasingly frequent appearances on national television. They’ve included an interview on Fox News that irritated Trump so much that he posted on Truth Social, “They make me fight battles I shouldn’t have to fight.” Walz is also co-chair of the rules committee for the Democratic National Convention. And he led a White House meeting of Democratic governors with Biden following the president’s disastrous performance in his debate with Trump.

Putting Walz on the ticket could help Democrats hold the state’s 10 electoral votes and bolster the party more broadly in the Midwest. No Republican has won a statewide race in Minnesota since Tim Pawlenty was re-elected governor in 2006, but GOP candidates for attorney general and state auditor came close in 2022.

Trump finished just 1.5 percentage points behind Democrat Hillary Clinton in the state in 2016. While Biden carried Minnesota by more than 7 points in 2020, Trump has taken to falsely claiming that he won the state last time and can do it again.

Minnesota has produced two vice presidents, Hubert Humphrey and Walter Mondale.