Minnesota Democrats have formally nominated Vice President Kamala Harris and Gov. Tim Walz as their party’s presidential ticket. Delegates from Minnesota and other states cast ceremonial votes in a roll call Tuesday night at the Democratic National Convention.

Gov. Walz’s big night in Chicago is Wednesday night. He will introduce himself to the nation during a prime time speech. MPR News correspondent Mark Zdechlik joined MPR News host Cathy Wurzer with a preview from the DNC in Chicago.