The Iranian motivation to kill Trump is believed to stem from a desire for revenge over his decision when he was president to order the US strike that killed Maj Gen Qassim Soleimani, the commander of the Islamic Revolutionary Guard Corps’ elite Quds force in January 2020.
Iran has denied plotting to assassinate Trump.
It came as a Senate report was issued on Wednesday on Trump being shot in July in an attempt to kill him at an election rally in Pennsylvania. It concluded that there was a failure of leadership among the Secret Service team assigned to protect him.
The plot identified by the ODNI is thought not only to be distinct from the Pennsylvania attempt but also from a second suspected domestic assassination bid that took place at Trump’s golf club in West Palm Beach, Florida, earlier this month that was foiled after a Secret Service agent fired on an armed man who was spotted lurking in bushes.
The alleged gunman, Ryan Routh, was apprehended after fleeing and was charged on Tuesday with the attempted assassination of Trump.
In August, federal prosecutors charged a Pakistani man said to have ties to Iran with taking part in an alleged murder plot against an unidentified US politician.
Last week, US intelligence officials said Iranian hackers stole materials from the Trump campaign and passed them to media outlets and the now-defunct campaign of Joe Biden, which all declined to publish them. A Microsoft threat assessment analysis has linked the hack to a group within the Iranian revolutionary guards.