North Korean leader Kim Jong Un received a personal letter this weekend from President Donald Trump, CNN reported Monday night, as a separate report said the countries would hold talks later this week. The contents of the letter were unknown, but CNN reported one of Kim's top negotiators, Kim Yong Chol, may visit Washington this week to set up another summit between Kim and Trump. Reuters also reported high-level talks later this week between Kim Yong Chol and Secretary of State Mike Pompeo. Reuters said the two are expected to choose a site and time for the summit, following up on last year's historic meeting in Singapore. Despite encouraging words at that summit, the U.S. and North Korea have since been at odds over North Korean denuclearization.