It's fake, there is no unnamed senior official.
@POTUS_Schedule
Wednesday, 05 September 2018 17:00 -
No #POTUS travel outside the #WhiteHouse secure area is expected for the remainder of today and tonight.
The NY Times anonymous op-ed writer (if the traitor exists) will be identified - A National Security investigation has been instituted.
https://mobile.twitter.com/POTUS_Schedule/status/1037512743925022721