Musk then slapped his chest with his right hand, before flinging it diagonally upwards, palm face down. He turned around to audience members behind the podium, and repeated the gesture. “My heart goes out to you,

Some across the political spectrum said the gesture looked like a "Heil Hitler" salute. The ADL said it was not.

Billionaire's estranged daughter has used rival social media platforms to attack Trump's anti-transgender executive order, and her dad's salute.