In Wisconsin, Cuban and Harris launch a three-state swing campaign.

• Mark Cuban will join Kamala Harris in campaigning in Wisconsin.
• The "Shark Tank" star and former majority owner of the Dallas Mavericks, Cuban, will also participate in events with Harris in Arizona and Michigan.
• Donald Trump has been criticized by Harris' economic plans, while Cuban has praised them.

On Thursday, Mark Cuban will campaign with Kamala Harris in Wisconsin, the first of three swing states he will visit to support her bid for the White House.

On Thursday, Cuban, a "Shark Tank" star and former majority owner of the Dallas Mavericks, will join Harris at events in Milwaukee and La Crosse, according to a Harris campaign official.

On Saturday, he will travel to Phoenix, Arizona, to give a talk on Harris' economic plan. On Sunday, he will campaign with second gentleman Douglas Emhoff in Grand Rapids, Michigan, the official stated.

Yahoo Finance first reported that Cuban's swing through the major battlegrounds is consistent with his frequent praise of Harris in CNBC and other media interviews.

Trump's pledge to impose broad tariffs on China has been criticized by Cuban as "lunacy."

Cuban stated on the Sept. 24 call that imposing tariffs of 10%, 20%, or 60% on China or any other country would be inflationary and a tax on the American people, effectively making it a sales tax.

This is developing news. Please check back for updates.