President Donald Trump sent his clearest warning yet to the North Atlantic Treaty Organization (NATO) on Sunday: Stand with the U.S. for defense of the Strait of Hormuz or face a "very bad" future. "It's only appropriate that people who are the beneficiaries of the strait will help to make sure that nothing bad happens there," Trump told The Financial Times in an interview Sunday. "If there's no response, or if it's a negative response, I think it will be very bad for the future of NATO."