Prince's family has asked Donald Trump not to use the singer's music at his public meetings, as he has on several occasions.
"Prince's heirs have never given their permission to President Trump or the White House to use Prince's songs and have been asked to stop all use immediately," Prince Omarr Baker, Prince Rogers Nelson's half-brother, tweeted.
Contacted by AFP, Trump's campaign committee did not respond.
According to the American press, Trump's campaign team used one of the singer's best-known songs, "Purple Rain," in several meetings.
Prince joins a long list of artists whose heirs or themselves have asked the president not to use their music in public acts.
The Rolling Stones, Adele, Neil Young, R.E.M., Aerosmith and Queen, as well as the heirs of George Harrison, denounced the use of their works during republican meetings.
The family of the late Italian tenor Luciano Pavarotti also criticized the use of "Nessun Dorma," Puccini's famous "Turandot" aria in Trump acts.
American politicians can get permission from the copyright associations that waive them to request explicit permission from the singers and groups involved.
American law provides for the possibility of an artist requesting that their music not be used if they consider "that the campaign suggests that the musician … supports the candidate," according to the American association of the disco industry (RIAA in acronym in English).
Several artists, including the Queen, threatened to file a lawsuit to prevent the use of their songs in Republican political acts, but no one put the promise into practice.