When South Korean President Moon Jae In meets US President Donald Trump in Washington tomorrow, he will likely try to play mediator between the United States and North Korea.

His role as a go-between has gained new importance after North Korea threatened last week to pull out of the planned summit between Mr Trump and North Korean leader Kim Jong Un in Singapore on June 12.

Experts say that the South Korean leader will likely lay out short-term and long-term goals to reduce tensions, and achieve a peace treaty and denuclearisation.

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