Conservatives criticized Sen. Cory Booker for an alleged "Nazi salute" at a California Democratic Party event, questioning media coverage of Elon Musk's similar gesture in January.

Online users shared a video showing U.S. President Donald Trump and first lady Melania Trump observing the festivities from a White House balcony.

In neighboring Serbia, populist President Aleksandar Vucic criticized Perkovic's concerts as a display “of support for pro-Nazi values.” Former Serbian liberal leader Boris Tadic said it was a “great shame for Croatia" and "the European Union” because the concert “glorifies the killing of members of one nation, in this case Serbian.”