North Korea has ​doubled down on expanding its nuclear fleet and continued its criticism of the U.S., although it has refrained from personal attacks on Trump.

The powerful sister of North Korean leader Kim Jong Un has dismissed the U.S.’s intent to resume diplomacy on North Korea’s denuclearization

South Korea is studying various plans to improve relations with North Korea, a spokesperson for South Korea's Unification Ministry said on Monday, in response to a media report that Seoul is considering allowing individual tours to North Korea.