North Korean leader Kim Jong-un has reaffirmed his commitment to denuclearizing the Korean Peninsula by the end of Donald Trump’s first term in office, saying his faith in the U.S. president remains “unchanged.” That’s according to a senior South Korean diplomat who met with Kim ahead of a planned summit between leaders of the North and South later this month. In remarks to the South Korean envoy, Kim said he was frustrated about skepticism over what he’s called “very significant and meaningful” steps toward ending the prospect of war on the peninsula.