South Korean president lobbies US leaders on North Korea policy

South Korea's new President Moon Jae-In lobbied US leaders on Thursday to back his policy of engagement with North Korea, as the Trump administration vowed to increase pressure on Pyongyang over its nuclear program.The Trump administration has been trying to isolate the North Korean regime following a series of missile tests, including by persuading China -- Pyongyang's main diplomatic ally -- to help bring Kim Jong-Un into line.