Trump urges regime change as Iran's supreme leader is killed after U.S., Israel attack

“We expect casualties with something like this. We have three, but we expect casualties — but in the end it’s going to be a great deal for the world,” Trump said, referencing the three Americans who died in Kuwait during the operation.

Asked what outcome he would like to see, Trump described the possible scenarios.

“There are many outcomes that are good," he said. "Number one is decapitating them, getting rid of their whole group of killers and thugs. And there are many, many outcomes. We could do the short version or the longer version.”

Trump also said Iranian officials are interested in continuing talks with the U.S., but declined to say whether the U.S. will pause strikes during diplomatic efforts.

“I don’t know," he said. "If they can satisfy us. They haven’t been able to.”

"For now, Operation Epic Fury continues unabated," the official said.

Trump said again he launched the strikes because the Iranians "weren’t willing to stop their nuclear research" and "weren’t willing to say they will not have a nuclear weapon."