Trump says Iranian Supreme Leader Khamenei should be 'very worried' amid tensions

President Donald Trump said Iran's supreme leader should be "very worried" at the moment as tensions between the U.S. and the Islamic Republic continue to escalate. 

"NBC Nightly News" anchor Tom Llamas spoke with Trump regarding concerns over the president's credibility as he threatens Ayatollah Ali Khamenei and the Iranian regime over its killing of thousands of protesters.

"I would say he should be very worried, yeah. He should be. As you know, they’re negotiating with us," Trump said...