Incumbent John Rutherford holds a commanding position in the Florida 5th Congressional District Republican primary due to his established record, strong fundraising exceeding $700,000, and recent endorsement from the U.S. Chamber of Commerce highlighting his pro-business stance. As a five-term representative and former Jacksonville sheriff, he has historically secured comfortable primary victories in the solidly Republican district. Challenger Mark Kaye, a conservative podcaster and radio host, trails significantly with limited resources around $28,000 and relies on media visibility for support. The August 18 primary leaves little time for shifts, though late developments such as turnout surges or unforeseen controversies could still influence the outcome in this low-uncertainty contest.