In addition to a New York Times report saying that President Trump is still using his unsecured Android phone to continue posting missives to Twitter, Newsweek claims
that members of the White House staff are using e-mail accounts hosted
by the Republican National Committee through its rnchq.org mail server.
And it appears that Press Secretary Sean Spicer has at least twice so
far posted his password to his official White House Twitter account.

(via Get ready for the next White House e-mail (and Twitter) scandal | Ars Technica)