The Commerce Department issued Friday an order blocking new downloads of WeChat and TikTok in the U.S. as of Sept. 20.

The state of play: President Trump has been in a standoff with TikTok, threatening to ban the app if it's Chinese owner, ByteDance, does not relinquish control to a U.S. company. A deal is in the works with the American tech company Oracle, but would need to go through before Sunday to prevent TikTok from being ousted from app stores.