How could Tim Walz’s political record help and hurt Harris?

The presumptive Democratic nominee, Kamala Harris, has chosen the Minnesota governor, Tim Walz, as her running mate in the presidential race, elevating a popular although relatively unknown leader who has attracted the support of progressive voters in recent days.

Walz has served as Minnesota’s governor since 2019 after 12 years in the House of Representatives and now leads the Democratic Governors Association. He has built a reputation as a folksy politician who can get things done, as Minnesota has adopted a number of progressive laws during his tenure. According to a poll conducted earlier this year, Walz enjoys an approval rating of 55% among Minnesotans.

Since Minnesota Democrats achieved a legislative trifecta in the 2022 elections, Walz and his allies have used their power to push a slate of progressive policies. The governor signed bills protecting abortion access, expanding background checks for prospective gun owners and legalizing recreational marijuana.

Related: Who is Tim Walz, the governor who is Harris’s vice-presidential pick?

“Right now, Minnesota is showing the country you don’t win elections to bank political capital,” Walz said last year. “You win elections to burn political capital and improve lives.”

That philosophy has endeared him to progressives, who threw their support behind him as the veepstakes kicked into high gear over the past two weeks. They reshared clips of Walz lightly mocking his daughter’s vegetarianism and tinkering with his car to paint him as the dad that America needs right now. But as the running mate, Walz will need to introduce himself to a much wider audience. A recent ABC News/Ipsos poll showed that only 13% of Americans knew enough about Walz to register an opinion of him.

The other finalist in Harris’s running mate search was the Pennsylvania governor, Josh Shapiro, whose popularity with his constituents could have helped Democrats in a key battleground state. Joe Biden won Pennsylvania by just one point in 2020, while he enjoyed a more comfortable seven-point victory in Minnesota. But Democrats are confident that Walz’s record will mobilize voters across the country.

Last year, Walz signed a bill that provided free breakfast and lunch for all students attending public and charter schools in Minnesota. The program allows students to receive one free breakfast and lunch a day, regardless of their income, according to the Minnesota Reformer. Through the first few months it was in effect, the state saw a significant jump in the number of meals requested.

When he was running for Congress in 2010, Walz received an “A” rating from the National Rifle Association. At the time, the group cited his support for legislation allowing people to carry guns in national parks, as well as his decision to sign on to a pro-gun amicus brief in District of Columbia v Heller, a 2008 supreme court case, that significantly expanded the second amendment.

But since then, Walz has spoken out in favor of gun control measures. Last year, he approved a measure to enact a “red flag” law to remove guns from people deemed to be a danger to themselves or others. He also expanded background checks for gun purchases to include private transactions. And he has said he favors an assault weapons ban. When he ran for governor in 2018, Walz celebrated that the NRA gave him an “F” rating, and donated the $18,000 the group had given him throughout his congressional career to a veterans group, according to CNBC.

After the US supreme court overturned Roe v Wade, Walz was the first governor to enshrine abortion protections in state law. He has also taken executive action to protect gender-affirming care in his state and enacted paid family leave supported by a 0.7% payroll tax on employers, according to CBS News.

He has also approved legislation that requires Minnesota to generate all of its energy from carbon-free sources by 2040.

Walz enacted a swath of expansive voting rights measures.

He signed a bill last year making it easier for people with a felony conviction to vote in Minnesota. The measure automatically allows people with felonies to vote once they leave prison – they previously had to also complete probation as well as parole. The bill allowed at least 55,000 people to vote. He has also approved a state-level Voting Rights Act, cementing protections for minority voters at the state level as the US supreme court chips away at the federal version of the law. Walz also enacted legislation that allows for automatic voter registration, permits 16- and 17-year-olds to pre-register to vote, and lets Minnesotans sign up to automatically receive a mail-in ballot.

Walz also legalized marijuana in the state, though his cannabis tsar was forced to resign after it emerged that she had sold illegal marijuana products in the state. He also approved a bill that allows undocumented people to get a driver’s license.

Walz hasn’t been without criticism during his time in office. A state audit of his department of education found that it “failed to act on warning signs” that could have prevented a giant $250m non-profit fraud related to pandemic funds, according to the Minnesota Star Tribune. Walz’s office has also clashed with the prosecutor in Hennepin county over some high-profile cases, CBS News reported.

Republicans wasted no time in beginning to attack Walz.

“It’s no surprise that San Francisco liberal Kamala Harris wants west coast wannabe Tim Walz as her running-mate – Walz has spent his governorship trying to reshape Minnesota in the image of the Golden state. While Walz pretends to support Americans in the Heartland, when the cameras are off, he believes that rural America is ‘mostly cows and rocks’,” the Trump campaign said in a statement.

“From proposing his own carbon-free agenda, to suggesting stricter emission standards for gas-powered cars, and embracing policies to allow convicted felons to vote, Walz is obsessed with spreading California’s dangerously liberal agenda far and wide. If Walz won’t tell voters the truth, we will: just like Kamala Harris, Tim Walz is a dangerously liberal extremist, and the Harris-Walz California dream is every American’s nightmare.”

“The most liberal ‘nominee’ to ever appear on a presidential ballot has now chosen a progressive running mate who has voiced support for socialism, supports sanctuary cities and wants to give driver’s licenses to the millions of illegal aliens Kamala Harris has allowed into our country. No amount of spin from the campaign or the media can distract from the objective facts and the disastrous records of Harris and Walz,” Mike Johnson, the US House speaker, said in a statement on Tuesday.

Walz also received criticism in May 2020, when the city of Minneapolis was engulfed in unrest following the murder of George Floyd by a white police officer. After a police station was set on fire, Walz criticized the city’s response to the unrest as an “abject failure”.

After days of increasing tensions, the state took over the response to the protests. Walz said he had followed the correct protocol by waiting for city leaders to request assistance before sending in the national guard, but some critics dismissed the governor’s action as too little too late.

“Above all else, this is a failure in leadership, and that leadership rests on Governor Walz’s shoulders. The governor cannot blame the mayors of Minneapolis and St Paul,” Paul Gazelka, who was then the Republican state senate majority leader, said at the time.

With Walz now back in the news as Harris’s running mate, he can expect that every piece of his résumé will be subject to the strictest scrutiny in the weeks ahead.