2020Flipped from RepublicanFinal resultsIncumbent defeated
2020 election for Delaware Senate District 7
Delaware State Senate · Delaware
Spiros Mantzavinos (D) won with 51.4% of the vote, defeating Anthony Delcollo (R) by 2.7 points, a seat Republicans won last time.
Spiros MantzavinosDemocrat · winner
51.4%10,399
Anthony DelcolloRepublican · incumbent
48.6%9,851
20,250 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET