Here's something Democrats thought they knew during the last presidential campaign: Wisconsin was safe. It was a lock for Democratic nominee Hillary Clinton. But when the votes were counted, it was a stunning upset for Republican Donald Trump.
In 2020, Democrats apparently aren't taking the state for granted.
Even though the first nominating contests in Iowa and New Hampshire are some 11 months away, and with Wisconsin's primary not until April 7 of next year, the campaign stops have already begun.