Presidential Election Results 1988–2024
| Year | D % | R % | Winner | Margin | Context |
|---|---|---|---|---|---|
| 1988 | 43.5% | 55.9% | Bush | R +12.4 | Last time Delaware votes Republican; Biden still in Senate |
| 1992 | 43.5% | 35.3% | Clinton | D +8.2 | Recession flips DE; Perot 20.4%; DE realigns permanently D |
| 1996 | 51.8% | 36.6% | Clinton | D +15.2 | Biden Senate endorsement boosts Clinton; suburban professionals lock in D |
| 2000 | 55.0% | 41.9% | Gore | D +13.1 | DE Safe D confirmed; corporate Wilmington financials lean D |
| 2004 | 53.3% | 45.8% | Kerry | D +7.5 | Post-9/11 environment narrows margin; Delaware still D |
| 2008 | 61.9% | 36.9% | Obama | D +25.0 | Biden chosen as VP nominee; DE delivers huge Obama margin |
| 2012 | 58.6% | 39.9% | Obama | D +18.7 | Biden VP re-election year; Delaware strongly for Obama-Biden |
| 2016 | 53.4% | 41.9% | Clinton | D +11.5 | Margin narrows vs Obama; rural Sussex County shifts R sharply |
| 2020 | 58.7% | 39.8% | Biden | D +18.9 | Biden home state; largest margin since 2008 |
| 2024 | 56.3% | 42.2% | Harris | D +14.1 | Without Biden on ballot; Harris holds strong, margin narrows somewhat |
State Voting Trend Analysis
Delaware's transition from a reliably Republican state to a Safe Democratic one is a story of suburban professional realignment and the Biden political legacy. Through the 1970s and 1980s, Delaware was a classic Northeastern Republican state — corporate, moderate, dominated by DuPont money and the financial services industry clustered around Wilmington. George H.W. Bush won it by 12 points in 1988. One cycle later, it had flipped permanently.
The 1992 Clinton coalition included college-educated suburban professionals who had historically voted Republican but drifted Democratic on social and economy issues. Delaware's workforce — heavily concentrated in banking, law, and corporate services in the Wilmington corridor — fit this profile precisely. Once those voters moved, combined with Delaware's 22% Black population in Wilmington voting D+80, Republicans had no path to a statewide majority.
Joe Biden's presence in the Senate reinforced the Democratic alignment for three decades. When he became Barack Obama's running mate in 2008, Delaware delivered a 25-point margin. His presidency (2021-2025) sustained and deepened the state's Democratic identity. The 2024 result — Harris winning by 14 without Biden on the ballot — confirmed that the state's Democratic lean is structural, not personal.