Beto O'Rourke is heading back to Wisconsin.

O'Rourke, who officially launched his presidential campaign this week, will head to Madison and Milwaukee on Sunday after wrapping up a three-day road trip around Iowa. Details on times and locations were not released.

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O'Rourke was in Wisconsin last month when he met with students in Milwaukee and Madison.

There are plenty of reasons Democrats are already focusing on Wisconsin.

Milwaukee was picked to host the 2020 Democratic National Convention on Monday.

RELATED:Milwaukee wins tight race to host the 2020 Democratic National Convention

RELATED:How Milwaukee talked the Democrats into bringing the 2020 national convention to the city

Wisconsin is a political battleground that propelled President Donald Trump to the White House in 2016, and will likely prove crucial in 2020. Democratic candidate Hillary Clinton did not appear in the state during the 2016 general election, a self-inflicted wound that still cuts deep with a lot of local Democrats.

Even though Wisconsin's primary is relatively late in the cycle, April 2020, it could matter in the nomination fight, especially with an already large — and still growing —presidential field.

"No person will be taken for granted and no community will be written off as he plans to visit places that represent the great diversity of this nation, including rural, suburban and urban communities in Wisconsin, Michigan, Ohio, Pennsylvania and more," a source close to the campaign said.

Contact Mary Spicuzza at (414) 224-2324 or mary.spicuzza@jrn.com. Follow her on Twitter at @MSpicuzzaMJS or Facebook at https://www.facebook.com/mary.spicuzza.