President Donald Trump took the unusual step Thursday of releasing a letter he received last week from North Korean leader Kim Jong Un that hailed their summit meeting in Singapore as the “start of a meaningful journey” and called for “practical actions” on both sides.
The letter illustrated Mr. Kim’s apparent calculation that negotiations to denuclearize the Korean Peninsula can best be advanced by appealing directly to Mr. Trump rather than the U.S. president’s subordinates, who are now tasked with pressing the North Koreans...