Delaware’s at-large House seat has remained under consistent Democratic control for decades, supported by the state’s partisan lean and voting patterns in federal contests. Incumbent Sarah McBride, elected in 2024 by a double-digit margin, faces a primary in September 2026 but no significant general-election challenge, with nonpartisan ratings classifying the district as solid or safe Democratic. Multiple Republican primary candidates have filed, yet none have demonstrated the fundraising or statewide profile needed to contest the seat effectively. Traders assign the Democratic nominee a 93.5% implied probability, reflecting these structural factors and the absence of recent developments that would alter the race’s trajectory. A late-breaking national Republican surge or unforeseen candidate withdrawal could theoretically narrow the gap, though such shifts remain improbable given the district’s established baseline.