US intelligence leak complicates summit with South Korea

Leaked U.S. intelligence documents suggesting Washington spied on South Korea have put the country’s president in a delicate situation ahead of a state visit to the U.S., the first such trip by a South Korean leader in 12 years.

The documents contain purportedly private conversations between senior South Korean officials about Ukraine, indicating that Washington may have conducted surveillance on a key Asian ally even as the two nations publicly vowed to reinforce their alliance.