Catalina Lauf leads trader consensus at 52% in the August 18, 2026, Republican primary for Florida’s 19th Congressional District, reflecting her Trump administration experience and positioning as a consistent conservative in the open seat vacated by Byron Donalds. Jim Schwartzel follows at 19% amid strong local fundraising and business ties in the Fort Myers area, while Jim Oberweis and Madison Cawthorn trail at 11% and 10% respectively, drawing on prior officeholding and name recognition. Recent campaign finance reports and candidate announcements have reinforced Lauf’s frontrunner status among traders, with the crowded field of six major contenders highlighting competition over ideological positioning and donor support ahead of the primary.