Tuesday's primary elections delivered a split verdict for Democrats in key Midwestern states and set up a runoff between two Republicans for a U.S. Senate seat in South Carolina, shaping the November landscape for House and Senate majorities.

In Wisconsin, moderate David Crowley defeated democratic socialist Francesca Hong in the Democratic primary for governor. Crowley, the Milwaukee County executive, will face President Donald Trump-backed Republican Rep. Tom Tiffany in the general election.

Hong, a 37-year-old state legislator and former chef, campaigned on a leftward platform, challenging the party's incremental approach. "That incrementalism is irresponsible," Hong told supporters Monday. "We deserve so much better."

Hong's surge left moderate alternatives struggling to consolidate support. Both of Democratic Gov. Tony Evers' lieutenant governors, Mandela Barnes and Sara Rodriguez, exited the race in July.

Crowley re-entered the contest with Evers' endorsement after Rodriguez's exit during a campaign finance scandal. Tiffany has significantly outraised both Hong and Crowley throughout the campaign, a financial edge that will follow the Democratic nominee into November.

In Minnesota, progressive Lt. Gov. Peggy Flanagan won the high-profile Democratic Senate primary. Flanagan's victory followed an endorsement from Sen. Bernie Sanders, a win for the party's left wing in that state.

Republicans in South Carolina will face a special Senate primary runoff Aug. 25 between Sen. Darline Graham and Rep. Ralph Norman. Neither candidate secured the majority needed to win outright on Tuesday.

The South Carolina runoff is the latest test of Trump's influence within the Republican Party. While Trump-backed candidates performed well in some statewide races Tuesday, his overall endorsement record showed mixed results.

A congressional primary in southwestern Wisconsin also featured an ideological split. Cooke, who has Democratic institutional support, raised approximately $8.6 million—far more than his opponent Emily Berge, who raised around $729,000.