Delaware Political History & Voting Patterns
Swing state through 1970s-80s; reliably D since 1992. A complete guide to how Delaware has voted in presidential elections, which coalitions have driven results, and how the state has shifted over time.
Historical Overview
Delaware, the First State, was competitive through the 1980s. Its northern (Wilmington/New Castle County) vs. southern (Kent and Sussex Counties, rural) divide mirrors the national pattern. Joe Biden spent 36 years representing Delaware in the Senate, and his political operation became the backbone of the state Democratic Party. Since 1992, Delaware has not voted for a Republican presidential candidate. In 2024, Sarah McBride became the first openly transgender person elected to Congress, representing DE-AL.
Key Elections & Turning Points
| Year | Significance |
|---|---|
| 1972 | Nixon won by 20 points |
| 1984 | Reagan won DE |
| 1988 | Bush won |
| 1992 | Biden-effect? Clinton flipped |
| 2010 | Christine O'Donnell lost Senate race |
| 2024 | Sarah McBride won Congress — first trans member |
Geographic Voting Patterns
Democratic Strongholds
Wilmington/New Castle County (60% of state population)
Republican Strongholds
Sussex County (beach communities, inland conservative), Kent County
Realignment Driver
Primary factor: Biden political machine, suburban Wilmington growth, corporate headquarters culture