US Asked Russia to Delay Soyuz MS-13 July Launch to ISS for Two Weeks - Source

The blastoff of the Soyuz MS-13 manned spacecraft to the International Space Station (ISS), scheduled for 6 July, from the Baikonur space center, may be delayed for two weeks at the request of NASA, a source in the Russian rocket and space industry told Sputnik on Thursday. "The American side asked the Russian side to postpone the launch of the Soyuz MS-13 for two weeks - from 6 to 20 July, as well as to extend its flight for two months - from December 2019 until February 2020", the source said. More

(Source: Space Daily - Mar 31)