During a five-day plenary meeting of the ruling Workers’ Party, Kim called the U.S. “the most reactionary state that regards anti-communism as its invariable state policy.”

North Korean leader Kim Jong Un vowed to implement the “toughest” anti-U.S. policy, state media reported Sunday, less than a month before Donald Trump takes office as U.S. president. Trump’s return to the White House raises prospects for high-profile diplomacy with North Korea.