Delaware’s at-large congressional district remains a solidly Democratic seat ahead of the November 3, 2026, general election, reflected in trader consensus favoring the Democratic nominee at 96 percent. Incumbent Sarah McBride, who captured the seat in 2024 by double digits, faces no serious general-election threat according to nonpartisan race ratings that classify the contest as Safe or Solid Democratic. She advanced unopposed through the September 15 Democratic primary, while Republicans nominated Joseph Arminio after a low-turnout contest that drew limited statewide attention. Delaware’s consistent Democratic performance across recent cycles, combined with the state’s overall partisan lean and lack of competitive polling, has anchored market pricing. Late developments such as an unexpected scandal, sharp national partisan swing, or health event for the incumbent could still shift probabilities before Election Day.