As expectations grow that Republican control of Congress will weaken in the 2026 U.S. midterm elections, many analyses suggest that domestic constraints will intensify external pressure and increase risks to the global economy. The elections could also affect the economic and national-security strategies of allies, including Japan.
The midterm elections are scheduled for 3 November, with 435 House seats and approximately one-third of the 100 Senate seats up for election. While the Democrats may regain a majority in the House, expectations are growing that the Republicans will have difficulty maintaining their Senate majority. Dissatisfaction with the administration, driven in part by rising prices, is creating headwinds for the ruling Republican Party.
A decline in the ruling party's ability to manage Congress could limit its domestic achievements and encourage a shift toward a stronger foreign-policy stance. Uncertainty over tariff policy and trade measures could persist and weigh on the global economy. Countries including Japan will need to monitor negotiations with the United States and investment trends.
This article updates developments in the midterm elections and their implications, and examines the United States in the post-Trump era with the 2028 presidential election in view. A change in the balance of Congress could alter the difficulty of confirming Cabinet members and passing new legislation, and could also affect the intensity of external pressure and the direction of competition with China.
The impact of gerrymandering is also attracting attention, with state-level redistricting reportedly expected to affect the allocation of seats in the federal House of Representatives. This is cited as one factor that could make election results more difficult to predict.