Hillary Clinton never campaigned in swing state Wisconsin in 2016. Kamala Harris isn't making that mistake.

• Kamala Harris and Tim Walz took a short trip to Wisconsin to headline a rally during the DNC.
• The Democratic ticket took advantage of the key swing state's proximity to Chicago to stump there.
• It's a huge contrast with 2016, when Hillary Clinton skipped over campaigning in the state.

As thousands of Democrats from across the country took in the second day of the Democratic National Convention at the United Center in Chicago, Vice President Kamala Harris — the party's newly minted standard-bearer — beamed in remotely from a massive campaign rally in Milwaukee.