Trump warned that "the full strength" of the U.S. military would come down on Iran should it attack American assets, but added that the U.S. "can easily get a deal done between Iran and Israel."

The death toll is growing as Israel and Iran exchanged missile attacks for a third consecutive day on Sunday, and Israel is warning that worse is to come.

Planned talks on Iran's nuclear program, which could provide an off-ramp, were called off.