But one of the most hotly watched contests, the Democratic primary Senate race in Michigan, is still too close to call. Bill Pugliano / Getty Images / Getty Images LANSING MICHIGAN - AUGUST 4: Voters go to the polls to cast their ballots in the Michigan Primary election on August 4, 2026 in Lansing Michigan. AIPAC and its aligned groups spent millions of dollars backing Stevens in the Democratic primary — money that it's not clear paid off. Trump influence remains strong with RepublicansTrump-back candidates in Washington state, Kansas and Michigan won their party's nomination. In Kansas, Republican state Sen. Ty Masterson clinched the nomination.