Bruce Springsteen’s criticisms of Donald Trump last week appear to have triggered the president even further, as he is now calling for an investigation of the superstar singer’s endorsement of Kamala Harris,

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.

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,