The U.S. Senate
33 Class II seats + 2 special elections up this cycle. Currently 53R - 47D.
Senate 101
The U.S. Senate is often called "the world's greatest deliberative body." Every state gets exactly two senators, regardless of population. That means Wyoming (population ~580,000) has the same Senate representation as California (population ~39 million).
Key Facts
The 3-Class System
To avoid replacing the entire Senate at once, senators are divided into three groups called "classes":
These 33 seats are up for election in November 2026. Current split: 20R – 13D.
Special Elections
When a senator leaves office before their term is up (resignation, death, or appointment to another role), their state may hold a special election to fill the seat. In 2026, there are two special elections:
- Ohio — JD Vance resigned to become Vice President
- Florida — Marco Rubio resigned to become Secretary of State
What Does a Senator Do?
- Writes and votes on legislation
- Confirms (or rejects) the president's nominees for judges, cabinet members, and ambassadors
- Ratifies treaties with foreign nations
- Conducts impeachment trials
- Represents their entire state's interests
Path to Majority
seats Dems need to flip
max seats GOP can lose
Explore your state's races
Click your state on the map to see Senate candidates, ballot measures, and more.
All 33 Senate Seats Up This Cycle
Sorted by competitiveness. Competitive races are highlighted. Plus 2 special elections in Ohio and Florida (Class III seats vacated early).