Mandela Barnes has ended his campaign for governor and called on Democrats in the chaotic primary to come together. The Democratic nominee will face presumptive Republican nominee U.S. Rep. Tom Tiffany. “We have to do everything to defeat Tom Tiffany,” Barnes said. Sara Rodriguez ended her run amid a campaign finance scandal two weeks ago and former state economic development director Missy Hughes dropped out in June. After Rodriguez ended her campaign, Milwaukee County Executive David Crowley rejoined the race with the endorsement of Gov.