As it turned out, Vivek Ramaswamy only got one shot to lose himself in the music. Marshall B. Mathers III, better known as the rapper Eminem, has told Mr. Ramaswamy, a Republican presidential candidate, that he is no longer to use Eminem music on the campaign trail, just weeks after Mr. Ramaswamy broke into an impromptu version of Eminem’s “Lose Yourself” at the Iowa State Fair. At the fair, Mr. Ramaswamy, the 38-year-old political newcomer, had told Gov. “Vivek just got on the stage and cut loose,” his campaign spokeswoman, Tricia McLaughlin, said on Monday. “To the American people’s chagrin, we will have to leave the rapping to the real Slim Shady,” another of Mr. Mathers’s nom de plumes.

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Persons: Vivek Ramaswamy, Marshall B, Mathers, Eminem, Ramaswamy, didn’t, Kim Reynolds, “ Vivek, Tricia McLaughlin, “, Slim, ” Organizations: Mathers III, Republican, Fair, BMI, Daily Locations: Iowa