>> As South Korea's presidential hopefuls wrap up campaigning ahead of Tuesday's election, liberal candidate, Moon Jae-In, remains the favorite. And that can mean a change in Seoul's approach to dealing with the north. Moon is pushing for a return to the so-called Sunshine policy in opening relations and dialogue between the two Koreas.
A key part of that aim, reopening the Kaesong industrial zone. A joint project run by the two sides just north of the border. It's an important symbol of cooperation. But as Reuter's James Pearson reports, reopening it can violate international rules. United Nations sanctions are designed to stop the influx of money North Korea could use to spend on its nuclear and missile programs.
And some critics would argue that the case of industrial complex basically fed too much money into the North Korean regime for them to do that. Now Moon's people and his foreign policy advisors say well that topic's still open to debate, we don't know how exactly that money went there and they floated to the idea of renegotiating the reopening of an industrial complex at some point invited that certain conditions by North Korea are met.
>> But right now, North Korea doesn't appear in a mood to play by anyone else's rules. On Sunday, a fourth American citizen was detained in Pyongyang, arrested on suspicion of hostile acts against the state. He was working at the Pyongyang University of Science and Technology, or PUST, which is an organization funded by western missionaries or church groups, mainly in the United States.
And the issue is that North Korea, when its relations particularly with the United States are at a fairly low point can use these detainees to extract some sort of political concessions from Washington.>> Observers say for Moon to justify a return to sunshine, the North would need to at least signal some kind of concession.
And right now, that looks unlikely. As well as imprisoning another US national, state media is promising more weapons tests, saying it's nuclear force will be pushed to the max.