US President Donald Trump warned that Iran’s supreme leader should be “very worried,” as both sides prepare for their first formal negotiations since the United States bombed Tehran’s nuclear program last year.

Trump issued a new warning to Iran and its supreme leader, Ayatollah Ali Khamenei, ahead of expected talks over Tehran's nuclear program.

Trump threatens Iran with military action while pursuing diplomatic talks. Recent drone shootdowns escalate tensions as diplomatic summit approaches.

Amid a new Iran crisis, it’s getting harder to see how Trump emerges with the kind of crisp, easy win that he craves.

President Donald Trump says he and Chinese President Xi Jinping discussed the situation in Iran in a wide-ranging call as the U.S. administration pushes Beijing and others to further isolate Tehran.

President Donald Trump has threatened to launch military strikes on Iran if the Islamic Republic doesn't agree to a deal on its nuclear program.

In an exclusive interview with Tom Llamas, President Trump discussed the impact of striking nuclear sites in Iran and whether in his view Tehran is trying to restart the nuclear program.

“He’s in a situation where he needs to do something,” Brit Hume said.