Elon Musk is under investigation by the Secret Service for a tweet questioning why President Biden and Vice President Harris haven't faced assassination attempts, which Musk later deleted and claimed was a joke. The tweet followed two recent assassination attempts on former President Trump, highlighting the disparity in public reactions to threats against political figures. Trump's first assassination attempt in Butler, PA resulted in a bullet grazing his ear, while a second attempt at his golf course in Florida was thwarted by a vigilant Secret Service agent. The Secret Service has confirmed it is investigating Musk's tweet but has withheld details due to ongoing enforcement proceedings. The situation has sparked discussions on the media and public's desensitization to political violence and the varying responses to threats against different leaders.