U.S. President Donald Trump on Tuesday restored his "maximum pressure" campaign on Iran that includes efforts to drive its oil exports down to zero to stop Tehran from obtaining a nuclear weapon.

Ahead of his meeting with Israeli Prime Minister Benjamin Netanyahu, Trump signed the presidential memorandum reimposing Washington's tough policy on Iran that was practiced throughout his first term.

As he signed the memo, Trump described it as very tough and said he was torn on whether to make the move. He said he was open to a deal with Iran and expressed a willingness to talk to the Iranian leader.