People are familiar with her record as a prosecutor, but they aren't as familiar with her record as a senator.
She introduced the Marijuana Opportunity Reinvestment and Expungement Act of 2019 that would have decriminalized marijuana.
Walz for his part signed marijuana legalization in Minnesota and has been open to broader drug reform.
Biden was a relative dinosaur on the issue, but I think we can be hopeful about Harris/Walz on it.