In a press statement attached to its letter, North Korea's U.N. mission accused the United States of trying to intimidate countries into fully implementing U.N. sanctions by "openly threatening that they would be faced with "strong measures of sanction" by the U.S".
It's not unusual for Pyongyang to condemn Washington's moves to censure it, but direct protests to Congress are exceptionally rare.
Yonhap reported that North Korea experts said the meeting could provide both countries a chance to explore talks.
The Swedish Embassy in Pyongyang often serves as an intermediary between North Korea and the USA, but North Korean authorities regularly deny them access to American prisoners.
Pyongyang has sought to advance its nuclear and ballistic missile programs.
China has rigorously objected to the deployment of the US missile defense system in South Korea, saying it destabilized regional security and did little to curb any threat from North Korea's nuclear and missile programs, which are in defiance of USA pressure and United Nations sanctions.
North Korea said US and South Korean agents bribed and coerced a North Korean man into joining the plot which was foiled by its state.
In statements for foreign distribution, North Korea often refers to its leader Kim Jong-un without naming him, instead using the phrase "supreme leadership" or "supreme dignity".
It has been in high-indignation mode for the past two months because of military exercises between the US and South Korea that it sees as a prelude to invasion. As a result, the UN Security Council led by the United States has tightened the sanctions regime against North Korea. The talks, which are held intermittently, are an informal opportunity for the two sides to exchange opinions and concerns.
Choe is reportedly the leader of a North Korean delegation that recently met with a group of American experts, known to be led by Suzanne DiMaggio, director of US think tank New America, in Oslo, Norway, according to South Korean diplomatic sources. "Kim is attempting to prove he has the capability to strike the USA mainland with a nuclear weapon", Coats said. The State Department added that they want North Korea to "cease all illegal activities" for the possibility of talks. The House bill bars ships owned by North Korea or by countries that refuse to comply with United Nations resolutions against it from operating in American waters or docking at USA ports.