Oklahoma's 1st Congressional District remains a solidly Republican seat in the Tulsa area, driving trader consensus toward a Republican nominee victory margin in the 10-20 point range. The open seat after incumbent Kevin Hern's Senate bid produced a crowded June 2026 Republican primary that narrowed to Mark Tedford, who advanced following Jackson Lahmeyer's withdrawal. Democrat John Croisant ran unopposed in his primary. Forecasters rate the district safe or solid Republican based on its voting history and partisan lean, with limited recent polling or campaign events leaving the exact margin dependent on turnout, national conditions, and voter enthusiasm in the final weeks before the November general election.