Normally, when a primary candidate finishes with 10.5 percent of the vote, it is a clear signal of their irrelevance.James Fishback finished third in Tuesday’s Florida Republican gubernatorial primary, and at no point in the race did it seem like he ever had a chance. In fact, at no point in his broader career has the 31-year-old, who is known for his racist slurs and unabashed bigotry, achieved anything of note. The high-school-debate nonprofit he founded was hit with allegations that he had sexually groomed a 17-year-old employee. A hedge fund where he’d once worked said that it had planned...