The Six-Year Itch
See how a president’s party fares in the Senate at the six-year mark.
Welcome to Patchwork
Patchwork is the ultimate reference to the electoral history of the United States that delivers unique insights through approachable data and analysis. No forecasting. No prognosticating. Just the historical record made more accessible than ever before.
Explore United States Senate election history by state
Use the arrow keys to move between states. Press Enter or Space to select a state.
Featured Analysis
The Six-Year Itch
See how a president’s party fares in the Senate at the six-year mark.
Closest Presidential Elections
Rank close elections by the decisive state margin that determined the presidency.
Senate Delegations Over Time
See when states sent two senators from the same party—and when their delegations split.
Subscribe to the definitiveelectoral archive
A subscription unlocks the complete set of Patchwork historical records and featured analysis you won’t find anywhere else.
Subscribe to Patchwork
The Big Board
Sort every seat or state delegation by index score, partisan shift and more.
Explore the Big Board
Every U.S. Senate seat, governor and legislature, election by election.
Review candidates, vote shares, incumbents and partisan movement across the complete available electoral history of the U.S. Senate, governorships, and legislatures.
View a seat history
Compare states and officeholders.
Plot multiple Senate seats or governorships on one historical scale and compare them over time.
Build a comparison
Featured analysis and overlooked context.
See which competitive seats would represent an ordinary pickup—and which would mark a genuine partisan break.
Read the 2026 featureAbout Patchwork
Patchwork was founded in 2020 originally as a blog and has since grown into a resource to better understand the political composition of the United States within a broader political media industry that is disproportionately nationalized, federalized and “presidentialized”. Beginning with electoral analysis and expanding into other areas, Patchwork is built on the premise that sustaining a multi-majoritarian democracy means centering the avenues citizens have to influence public life in the states.