Incumbent Democratic Representative Sarah McBride faces Republican nominee Joseph Arminio in Delaware’s at-large congressional district on November 3, 2026. Multiple nonpartisan forecasters rate the race Solid or Safe Democratic, reflecting the state’s consistent voter registration edge for the party and McBride’s 2024 victory margin exceeding 15 points. The Democratic primary drew no opposition, while Arminio prevailed in a three-candidate Republican primary. Trader consensus assigns the Democratic Party a 98.4 percent implied probability of victory, consistent with historical patterns in this single-district state. A late-breaking scandal, significant health development, or unusually strong national Republican performance could narrow the margin, though structural factors limit realistic paths to an upset.