However on Wednesday he also warned the USA was about to impose the "toughest and most aggressive round of economic sanctions on North Korea ever".
US officials have declined to elaborate on the sanctions Pence mentioned, saying any further information could help countries that might try to get around the measures - an apparent oblique reference to Chinese vessels that have been caught on satellite trading oil with North Korean ships in violation of United Nations sanctions.
Believed born in 1987, Kim Yo-jong is said to be very close to Kim Jong-un, who is about four years older than her.
Officially the delegation will be headed by Kim Yong-Nam, who leads the presidium of the Supreme People's Assembly, the North's rubber-stamp parliament. Deputy Director of Department of Propaganda and agitation of Korean Workers ' Party, has gradually ascended and received a clear boost last October, when her bror introduced her as alternate member of party's Politburo, Main authority of regime.
The Canadian coach of the joint women's hockey team says her squad has made a three-page dictionary that translates key hockey terms from English into South Korean and then into North Korean for better communication among the players and herself.
"President Trump has said he always believes in talking, but I haven't requested any meetings".
And while the president has insisted any engagement be predicated on North Korea's complete renunciation of its nuclear ambitions, Tillerson in December offered to begin direct talks "without precondition".
Since assuming the country's top post in 2011, Kim Jong Un has carried out a series of purges, dismissals and executions in an apparent attempt to tighten his grip on power.
For North Korean leader Kim Jong Un, the parade is an opportunity to stoke patriotic fervor and to remind the world of his country's rapid progress on its nuclear program. "But with Kim Yo Jong, you are getting a person who's chiefly involved in designing Kim Jong Un's rule, a person whom the leader actually listens to".
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North Korea will march in the opening ceremony Friday as a united delegation with South Korea and field athletes in five sports. They had a half brother, Kim Jong Nam, who was murdered a year ago at a Malaysian airport.
She was promoted to the ruling party's executive committee previous year.
Many experts say North Korea wants to use its improved ties with South Korea to weaken US-led global sanctions, and that tensions could easily flare again after the Games.
"We told the skaters to prepare for a version without the lyrics to avoid political controversy and to perform while we wait for the IOC's decision", a spokesman for the Korea Skating Union said.
The first families of the USA and North Korea will both be represented at the Winter Olympics in Pyeongchang.
The North's participation has been seen as a thawing of bilateral ties.
A total of 22 North Korean athletes will compete in ice hockey, figure skating, short track speedskating, cross-country skiing and alpine skiing in PyeongChang. South Korean investigators are already said to be looking into Pyongyang's involvement in the hack of Seoul-based exchange Youbit, which collapsed in December.
The two Koreas have been divided by the Demilitarized Zone since the end of the Korean War in 1953, and Pyongyang's pursuit of nuclear weapons have seen it subjected to multiple rounds of United Nations Security Council sanctions.