https://techcrunch.com/2019/05/14/trump-is-reportedly-preparing-to-sign-an-executive-order-that-would-enable-a-ban-on-huawei-in-the-us/

As the trade war with China intensifies again, President Donald Trump is expected to sign an executive order that would make possible a ban on American companies from using telecommunications equipment from Huawei and other companies that the government believes pose a national security risk, Reuters reports.

The executive order cites the International Emergency Economics Power Act, a law enacted in 1977 that gives the President broad power to control trade in response to a national emergency. The order has been under consideration for a year, but repeatedly delayed, and may be delayed yet again, says Reuters. The Wall Street Journal first reported that the administration was considering executive actions in May 2018.