The Secret Service was aware of an Iranian plot to assassinate former President Donald Trump, leading to increased security measures. This information is separate from the recent shooting incident at Trump's rally in Pennsylvania. The US received intelligence about the plot just days after the shooting, raising concerns about security lapses. Iran has denied the allegations, emphasizing the need for legal action against Trump for Soleimani's assassination. President Biden has called for an independent review of the Secret Service's handling of the security breach.