US President Donald Trump said on Sunday he had instructed the Pentagon to substantially reduce joint military exercises with South Korea in a social media post that also mentions Seoul's refusal to take part in actions against Iran. Trump said in a post on his Truth Social site that, although it was too late to cancel the exercises entirely, he was "not happy" that the United States had previously agreed to participate. The U.S. president also cited his "very good relationship" with North Korean leader Kim Jong Un.