I'm not sure if this has become a big issue yet, but it's easy to predict that it will. This is how Fox News reports it.

"Tim Walz inherited the nation’s highest corporate income tax rate and sixth-highest individual income tax rate, and then drove tax burdens higher," Walczak said.

He explained, "As governor, Walz signed legislation expanding taxation of businesses’ international income, curtailed standard and itemized deductions for many taxpayers, added a surtax on the investment income of high earners, created a new payroll tax that will go into effect in 2026, and imposed a new tax on retail deliveries. "
..The left-leaning Institute on Taxation and Economic Policy (ITEP) praised Minnesota's tax reforms under Walz in a blog post last week, referring to the new code as "moderately progressive."
Since Walz has been at the helm, the North Star State has significantly under-performed the greater U.S. in both economic growth and employment growth rates.

Data from the U.S. Bureau of Economic Analysis shows Minnesota's economy has grown 6.2% under Walz's leadership, while the U.S. economy has grown 11.5% over the same time frame, according to an analysis by Reuters.

So what exactly are the positives?

Walz has signed into law a series of measures viewed as pro-worker. Last year, Minnesota established paid sick and medical leave, banned non-compete agreements and expanded protections for Amazon warehouse workers. In May, Minnesota enacted a measure providing a raise for Uber and Lyft drivers while averting a threat made by those companies to stop doing business in the state.
Last year, Walz enacted tax reform legislation that included a child tax credit worth up to $1,750 for each child 17 years old and younger in households earning up to about $96,000 a year

In addition, Walz expanded tax exemptions for social security payments as well as income resulting from student loan forgiveness.
To help offset these tax cuts, Walz enacted tax increases for some wealthy individuals and corporations. The state imposed a 1% surtax on capital gains, dividends, and other investment income that exceeds $1 million in a year. He also raised taxes for corporations that bring in a portion of their revenue abroad.

I must admit that I like this guy. As Harris' first pick, it gives me just a tiny bit of cautious hope. Where the rubber meets the road is what Harris does about the FTC and NLRB.