Trump's endorsement of Catalina Lauf days before the August 18, 2026, Republican primary for Florida's 19th congressional district has driven trader consensus toward her at 88.5% implied probability. The former Commerce Department official under Trump has secured additional backing from Representatives Greg Steube, Kat Cammack, and Anna Paulina Luna, Senator Jim Banks, and a Rand Paul-aligned super PAC running targeted ads. Earlier August polling showed Lauf and local businessman Jim Schwartzel essentially tied near 19% with substantial undecided voters, but the late national endorsements shifted momentum. Schwartzel holds the next-highest share at 11.3%, while former Representatives Madison Cawthorn and others remain at or below 1.3% amid the crowded field of ten candidates. The primary vote tomorrow will resolve the market.