News Trump formally cuts ties with World Health Organization, says he’s revoking Hong Kong’s trade perks in rift with China May 29, 2020May 29, 2020Kim Hjelmgaard and Deirdre Shesgreen, USA TODAYComments Off on Trump formally cuts ties with World Health Organization, says he’s revoking Hong Kong’s trade perks in rift with China U.S.-China tensions over coronavirus have been rising for weeks. The spat took a more serious turn after China adopted a law threatening Hong Kong.