Prime Minister Benjamin Netanyahu said in an interview with CNBC Wednesday that if necessary, the United States and Israel would resume military operations against Iran, but ultimately he would leave the decision to escalate in President Donald Trump’s court. He also confirmed that the two leaders speak every two days.

“I think there’s a tactical game that is being played,” Netanyahu said. “Iran surely knows what [Trump] has said, that if necessary, there will be a full-scale return to military action. It’s the president’s decision, Israel is ready, and the U.S. forces are ready.”

Although the prime minister said that Iran had been “enormously weakened,” he stopped short of predicting regime change.

“You can’t quite predict when a regime like that goes under,” he said. “You didn’t predict it in a number of cases: Not in Romania, and not in the fall of the Berlin Wall; and nobody predicted it, but it happened. Why? Because the cracks were propagating underneath.”

“In fact, you have enormous cracks right now in Iran, and you can’t predict when it’ll happen,” he continued. “But I said yesterday in a public forum here … ‘Look, I believe that ultimately these cracks will propagate and the regime will fall, and we’ll do our best.’”

“I think that we have to help the Iranian people to bring down this regime, and that hasn’t changed; but it’s not going to happen, you know, exactly at the moment of our choosing,” he added.