A few reasons. The liberals are in power in South Korea, and they have a much more friendly North Korea strategy. Couple that with the North Koreans' recent dev

A few reasons. The liberals are in power in South Korea, and they have a much more friendly North Korea strategy. Couple that with the North Koreans' recent development of ICBMs and a hostile strategy seems less desirable. The US certainly doesn't want a good relationship with North Korea, but without a South Korean government supporting their policy, and with an increased threat from the North, there's not much we can do.