Washington (CNN)President Donald Trump was due to receive a letter from North Korean dictator Kim Jong Un at the White House on Friday, the latest step toward a meeting between the two world leaders. Trump plans to meet in the Oval Office with Kim's envoy, Kim Yong Chol, the White House said. It's the highest-level meeting between a US president and a North Korean official since 2000. Top-level US officials have not read the letter from Kim to Trump, but are aware generally of its contents, a person familiar with the matter said.