Trump's call comes amid his feud with Springsteen as the president appeared to threaten the rock star for calling the the administration "corrupt, incompetent, and treasonous" during recent U.K. concerts.

The president claimed without evidence on Monday that Kamala Harris had violated campaign-finance law, essentially by paying superstars for endorsements “under the guise of paying for entertainment.”

Days after Bruce Springsteen slammed Donald Trump at a European concert, the president now says he's calling for a "major investigation" into the Boss and other celebrities' endorsements of Kamala Harris,