August 4 Primaries Test Trump Influence and Democratic Ideology

Voters in Michigan, Virginia, Kansas, Washington, and Missouri held primary elections on August 4, 2026, to determine nominees for 46 U.S. House seats, three Senate seats, and two open gubernatorial races. The contests centered on the ideological direction of both parties and the enduring influence of Donald Trump on the Republican base through his endorsements of candidates such as John James in Michigan, Ty Masterson in Kansas, and Amanda McKinney in Washington.

In Michigan, the Democratic U.S. Senate primary became a proxy battle between the party's establishment and progressive wings. Moderate U.S. Rep. Haley Stevens received record-breaking financial support from the American Israel Public Affairs Committee, while progressive Abdul El-Sayed emerged as a favorite by campaigning on Medicare for All and ending military aid to Israel. In other Michigan contests, Secretary of State Jocelyn Benson won the Democratic gubernatorial primary, while Republicans faced a choice between U.S. Rep. John James and Perry Johnson for governor.

Other notable races included a Democratic rematch in Missouri's 1st Congressional District between former Rep. Cori Bush and Rep. Wesley Bell. In Kansas, state Senate President Ty Masterson positioned himself as the GOP favorite for governor. These elections are considered critical for determining the balance of power in the U.S. Senate during the final two years of Donald Trump's presidency.