The tiara went to Kathy Zhu, but one day after she had been crowned Miss Michigan by the Miss World America organization, the beauty queen was stripped of her title.

Racially and religiously charged comments Ms. Zhu had made on Twitter came to the attention of pageant organizers, who ruled that they violated the competition’s rules of “good character.”

After a flurry of text messages and emails between Ms. Zhu, 20, and organizers, she was told the competition would no longer recognize her and she was to stop mentioning or using images of herself as the pageant’s winner.

Ms. Zhu, a conservative activist who is a University of Michigan senior and the social media director for the national group Chinese Americans for Trump , shared on social media an email she had received on Thursday from the pageant’s state director, Laurie DeJack.